Cool Math Lessons for Kids

cool math lessons hmm that should be easy because math is so exciting and fun math is like solving a puzzle or a mystery and helps us figure out what is going on around us first we are going to learn about perimeter something we can discover about shapes imagine i'm a race car driver right and they'll make fun of my car okay this is this is a perfectly good car to do a racing right it's very fast it's it's got the bells it's got the whistles it's a great race car okay stop laughing at it okay now imagine this is the race car course that i'm driving on right it's going around and oval it's going around a shape if i was wondering how far is it around the track what's the distance around the shape then i would need to know the perimeter the perimeter is the distance around a shape wait wait wait what is the perimeter [Music] the perimeter of a shape is the distance around a shape and it's easy to find you can find the perimeter of a shape by adding all of the sides that will tell you what the distance around the shape is [Music] great now let's practice finding the perimeter look at this triangle what is the perimeter of this triangle okay first we need to know how long all of the sides are then we can figure out the perimeter [Music] with this triangle all three sides are the same length so how long are they let's pretend we measured it and each side is 10 centimeters now remember to find the perimeter of a shape we need to know the distance around the whole shape so we just add the sides together what's ten plus ten plus ten that's three tens what does that equal yeah thirty awesome the perimeter of this triangle is 30 centimeters remember cm is an abbreviation for centimeters 30 centimeters is the perimeter of this triangle [Music] okay let's try this one what is the perimeter of this square first we need to know how long all the sides of the square are then we can figure out the perimeter of the square okay so this is a square it has four sides and all four sides are the same size let's pretend we measured it and each side is one yard remember y d is an abbreviation for the distance of a yard each side is one yard [Music] remember the perimeter is the distance around a shape so we'll need to add all of these sides up okay what's one plus one plus one plus one yeah four the perimeter of this square is four yards the perimeter remember is the distance around a shape if you were to go around this entire square it would be four yards okay this is the final one what is the perimeter of this rectangle [Music] well first we need to know how long all the sides of the rectangle are then we can figure out the perimeter remember a rectangle has four sides and two of the sides are shorter than the other two sides with this rectangle let's pretend we measured it at one meter on the short sides and three meters on the longer sides [Music] okay remember to get the perimeter we have to add all of the sides together so we're going to be adding four numbers together again to make it easier we're going to group the smaller numbers together and then put the larger numbers in our equation what's one plus one plus three plus three those are all the sides what's one plus one plus three plus three [Music] yeah eight that means the perimeter of this rectangle is eight meters wow we told you it's gonna be fun oh it's such a blast finding the perimeter the perimeter is so much fun to find it's like a game remember you can find the perimeter of a shape by adding all of the sides and the perimeter of a shape is the distance around a shape i'm so proud of you i'm so proud now you know how to find the perimeter of something the perimeter is the distance around a shape i could find the perimeter of this tablet right all i would need to do is measure each side and add them together and i would find the perimeter awesome next we are going to learn about something really powerful and amazing called multiplication multiplying is like being a detective you're cracking a code which is so cool you're solving mysteries like legit mysteries like i'm i'm in an office building right now there's a cake behind me for some reason i'm looking out right now at you guys and i see that you're like whoa we're gonna multiply and once you learn it's just a game so buckle in for the fun and the learning let's say you have two bikes and for some reason they look the exact same and somebody wants to give you an air pump they ask a simple question how many tires do you have to take care of to figure that out we're gonna use multiplication we're gonna play the game it's gonna be awesome okay so here is how multiplication works [Music] so we put the number that's in each group and then we put this x which means times and then the number of groups so that tells us how many times that number is going to show up and then we add them all together and you've got your answer isn't that cool and just a side note to work there has to be the same number in each group now remember we're trying to figure out how many tires you have to take care of if you have two bicycles all right now we have the wheels under each bike each bike has two wheels [Music] one two so we write down a two each bike has two wheels remember the first number we write down with multiplication is the number in each group then we write an x this x means times two times it's the symbol of multiplication [Music] all right the second number we write are the number of groups you can see them here how many groups do we have of two how many yeah two so it reads two times two to figure this out we are going to skip count by two two four that means two times two equals four if you have two bikes that means you have four wheels two two times is four remember this is how multiplication works the number in each group times the number of groups equals your answer of course to work there has to be the same number in each group all right let's take this to the next level let's say someone has four bikes and here are their wheels [Music] you know how to do this now each bike has two wheels so the first number we write down is the number two that's the number in each group [Music] we're gonna put the time symbol there and count the number of groups one two three four so it's two times four this is so much fun this is multiplication [Music] now let's skip count to get the answer two four six eight [Music] eight is our answer there are eight wheels two times four equals eight this is how multiplication works [Music] we put the number in each group times the number of groups and we get our answer you're getting the hang of it alright let's try this one [Music] let's say you buy three packs of trading cards let's say each pack had five cards in it huh that's a pretty good amount so three packs of five cards [Music] how many cards did you get in total that's a really great question sounds like we're gonna need to multiply so each group has five so that's the first thing we write down the number in each group that's five put the multiplication sign which is the x which means times five times how many groups are there one two three so the second number is three five times three what's five times three we're going to skip count to find out [Music] five ten fifteen five times three equals fifteen you have fifteen trading cards all right this is how it works you take the number in each group times the number of groups and you get your answer now here are some multiplication tricks that are going to be really sneaky ways that you can figure out multiplication problems really really quickly here's the trick if you multiply any number by zero you always get zero always you always get zero [Music] here's an example five times zero equals zero when you have zero groups of five that means you have zero there are none whenever you multiply any number by zero you always get zero one hundred times zero equals zero [Music] even if zero is the first number in the equation you still always get zero when you multiply by any number for example zero times eleven equals zero [Music] and zero times one thousand equals zero if you multiply any number by zero you always get zero oh this has been so much fun here is the next trick [Music] if you multiply any number by one it stays the same look at these seven times one equals seven one hundred times one equals one hundred thirty three times one equals thirty three [Music] if you flip them the answer stays the same one times seven equals seven one times one hundred equals one hundred one times thirty three equals thirty three honestly the order of the multiplied numbers does not change the answer if you were to flip the number of groups and the number in each group you would still get the same answer though we still recommend this way so simple the number in each group times the number of groups to get your answer [Music] so the two tricks have been if you multiply any number by zero you always get zero [Music] and if you multiply any number by one it stays the same the final multiplication trick is to use multiplication tables they come in all shapes and sizes but they are all helpful especially as you're first learning how to multiply here are some examples of multiplication tables there's a table for all of the numbers from 1 to 10. [Music] some kids memorize tables like these so that they'll know right off the bat in a moment what an answer could be for certain multiplication problems this is how multiplication works the number in each group times the number of groups gives us our answer great now we are going to learn about area something else we can discover about shapes area is something we can discover about shapes the area of a shape refers to how much space is inside of it area is very different from perimeter if you'll remember perimeter is the space around a shape area is the space inside of a shape all right so area is the space inside of a shape and perimeter is the space around a shape so they're very different aren't they in this video is all about area we're going to learn how to find the space inside of a shape this should be fun let's play a game called what's the area we want to find the area of this shape what kind of shape is this yeah a square remember the area of a shape is the space inside of the shape we are going to measure the area of the shape using square units so the area of the shape is how much space is inside of it so how many square units are inside of this square do you know if you don't just count them up yeah four there are four square units in this square four square units is the area of this square okay that was cool right let's try figuring out the area of this rectangle just like last time we are going to measure the area of this rectangle using square units remember the area of a shape is the space inside of the shape so how many square units are in this rectangle do you know yeah there are five square units in this rectangle great job that's the area of this rectangle five square units awesome now we are going to look at an irregular shape what is the area of this shape just like we did with the others we are going to measure the area of this shape using square units how many square units are inside of this shape feel free to pause this video to give yourself time to count them [Music] were you able to count all of them how many square units are in this shape what is the area of this shape yeah 12 square units great job there are 12 square units in this irregular shape so far finding the area has been very easy because we've shown you the inside of the shape so all you have to do is count how many units are inside but what if you can't see the units inside the shape what if there are just numbers that you know and you have to come up with the area another way here is the fun part to find the area of a shape you have to use multiplication yeah multiplication [Music] so how do you find the area of a square or a rectangle using multiplication all you have to do is multiply the length times the width to get the area here we'll show you [Music] let's say we want to find the area of this rectangle it is six feet long and one foot wide remember to find the area of a square or a rectangle all we have to do is multiply the length times the width the length times the width is the area it's just simple multiplication so we would write six times one six times one will give us the area of this rectangle what is six times one do you know yeah six times one is six whenever you multiply a number times one it stays the same so our answer is six feet squared that little two next two feet means squared it tells us that the rectangle has six square feet of space inside the area is six feet squared [Music] why don't we try another one let's say we want to find the area of this square it is three centimeters long on each side remember to find the area of a square or a rectangle all we have to do is multiply the length times the width for a square the length and the width are the same size aren't they well the length times the width is the area so we just have to multiply we would write three times three three times three will give us the area of this square what is three times three do you know hmm yeah three times three is nine the area of this square is nine centimeters squared that little two next to centimeters means squared it tells us that the square has nine square centimeters of space inside [Music] that was so cool what about this rectangle what is the area of this rectangle as you can see it is four meters long and 2 meters wide remember to find the area of a square or a rectangle all we have to do is multiply the length times the width the length times the width is the area it's just simple multiplication so we would write four times two four times two will give us the area of this rectangle what is four times two do you know yeah four times two is eight so the area of this rectangle is eight meters squared that little two next to meters means squared it tells us that the rectangle has eight square meters of space inside as we are wrapping up we want to share two quick tips about area as you saw from our examples when you find the area of a shape the answer is always squared if we discovered the area of a shape was measured in feet and the answer was 50 our answer could be written 50 square feet or 50 feet squared the answer is always squared because area tells us how much space is inside a shape the little two means squared the second thing we want to mention is that you have to use a different multiplication equation to find the area of circles and triangles in this video we just learned the basics of area and how to find the area of rectangles and squares but this is just the beginning in the start of an exciting math world there is so much more about area to learn [Music] very cool next we are going to learn about division another powerful and amazing thing we can do with numbers and we're going to start off with a story there's this kid named ethan and ethan loves carrots he loves carrots so much he loves to snack on him he loves when he gets to eat them they're crunchy they're tasty [Music] yeah carrots are awesome in fact i'm literally eating a carrot right now as i'm speaking carrots are great for your skin carrots are great for your eyes they're amazing you're a great snack and ethan loves them well ethan has two friends over kevin and chloe and they start to get hungry of course they all love carrots because carrots are like the perfect snack now in ethan's house there are only three carrots they're just three carrots we are going to have to divide the three carrots amongst the three kids so let's figure this out how many carrots does each kid get do you know uh-huh each kid gets one carrot pretty simple right three carrots three kids each kid gets one carrot hey did you know we just did division uh-huh we just did division division is pretty simple you see division is splitting a number up by any given number that's it just splitting a number up let's look at our story again there were three carrots and we divided those three carrots by three because there are three people right the three kids that love carrots and the answer of how many carrots each kid gets is one three divided by three equals one notice right here is the division sign this is what it looks like when you see that sign you could just say divided by so this reads three divided by three equals one let's try another example of division let's say there are eight presents eight presents and there are four women and we want each of the women to get the same amount of presents as the other women because we want it to be fair [Music] notice the division sign we are going to divide or split up eight by four remember to divide is to split up let's split these presents up into four equal groups one two three four all right how many presents does each woman get uh two each woman gets two presents isn't that cool division is so much fun and it's so easy remember division is splitting a number up by any given number that's it all right now it's time for division facts we're going to learn some pretty interesting facts about division and you're going to be like what oh my goodness like secrets this is super cool okay so just look around all right make sure all right so close clear all right it's time for division facts the first fact is this you can never divide by zero it's true you can never divide by zero even if you're a rule breaker and you're like i'm gonna do whatever i want you still can never divide by zero in fact if a teacher ever gives you a test and you see a problem where you have to divide a number by zero just right on the test undefined because that's exactly what that answer would be undefined it's impossible kind of like mr whiskers math skills does mr whiskers do math in his head all day long who knows his math skills are undefined we just don't know it's impossible to know you know mr whiskers might know how to do division who knows undefined you can't divide by zero you can never divide by zero if you ever see any division problem dividing by zero just write undefined it's impossible it's impossible so just write undefined the second fact is this you can write the division sign three ways uh-huh not just with that traditional division sign you can write it like the division sign or you can write a division problem with the slash or with a horizontal line for example look at this twelve divided by three equals four that's the original division sign the one that you might see more regularly [Music] but here is the same equation written in a different way twelve divided by three equals four it's still a division sign but it's a slash it means the same thing as the original division sign [Music] remember the division sign can also be a horizontal line twelve divided by three equals four that looks like a fraction doesn't it the line in a fraction means divided by these are the three ways that you can write the division sign pretty interesting [Music] all right the final fact is this okay this is so awesome you can flip the number of groups and the number in each group and the division problem stays true for example ten divided by two equals five and you can flip the two and the five and it stays true that means 10 divided by 5 equals 2. isn't that interesting 10 divided by 2 equals 5 and 10 divided by 5 equals 2. you can flip the number of groups and the number in each group and it still stays true or look at this eighteen divided by six equals three remember we can flip the number of groups and the number in each group and it still stays true so we could switch the six and the three and it stays true [Music] so 18 divided by three equals six the six and the three can be flipped so 18 divided by 6 equals 3 and 18 divided by 3 equals 6 pretty nifty those were some cool facts you know division is a great time wow all right next we are going to learn about fractions yes fractions a fraction is something that shows parts of a whole let's say there's this lady named cindy cindy has a pizza which is great she loves pizza so yummy pizza but then her friend chomsky arrives you remember chomsky chomsky likes pizza too and he's a little bit hungry so maybe cindy isn't gonna eat the whole pizza now maybe they're gonna split it what do you think so they split the pizza in half each of them get one half of the pizza not neat and everyone has pizza each of them have one half of the pizza they split it right down the middle now remember a fraction is something that shows parts of a hole [Music] so here is what the fraction looks like a one a line and a two that is the fraction one half each of them cindy and chomsky get one half of the pizza so this is one half it's a very important fraction because we use it all the time now you might be wondering what do the numbers mean and how does it show one half well the bottom number shows the total number of parts the top number shows how many parts we are talking about pretty simple let's go back to our example there are a total of two parts to the pizza so there's a two on the bottom and cindy just gets one part that's the part we're talking about so cindy gets just one half of the pizza she doesn't get the whole thing she gets just one part she gets one half the bottom number of a fraction is called the denominator the denominator is the total number of parts the top number is called the numerator the numerator tells us how many parts we are talking about in this case cindy is having one part of the pizza the other part of course is going to chomsky let's try this let's say there's another pizza and this pizza has four parts the number four is the denominator because there are four pieces of pizza four parts [Music] let's say kelly shows up and wants to have one part of the pizza one piece of the pizza the numerator or the top number of the fraction is the number one because kelly is having one part or one piece of the pizza kelly is having one fourth of the pizza pretty simple pretty fun fractions are awesome [Music] now we're gonna need your help help us figure out what fraction is it what fraction is it well we're gonna have a great time let's say we have a group of five sports balls one is a basketball the other four are soccer balls let's figure out what fraction of the balls are basketballs what fraction of the balls are basketballs so we know a fraction has a line in the middle and the top number is the numerator and the bottom number is the denominator [Music] the denominator shows us the total number of parts or units how many sports balls are there yeah five five is the denominator good job now remember we're asking for the fraction of sports balls that are basketballs so how many basketballs are there yeah just one the number one is the numerator so one fifth of the sports balls are basketballs one fifth great job let's try this final example let's say there are five pets five pets two of them are dogs and three of them are cats what fraction of the pets are cats huh that's a good question what fraction of the pets are cats remember here's what a fraction looks like it's got a line in the middle with the top number being the numerator and the bottom number is the denominator [Music] so the total number of pets is five what number is the denominator what number goes on the bottom yeah five five is the denominator it tells us the total number of pets [Music] remember we're asking for the fraction of the pets that are cats how many cats are there yeah three so what's the numerator yeah three three is the numerator three-fifths of the pets are cats wow that was so cool but none of those cats are as special to me as you mr whiskers not even a fraction of my heart belongs to my whole heart i love you mr whiskers i do i do a fraction is something that shows parts of a hole the top number of a fraction is the numerator how many parts we are talking about and the bottom number of a fraction is the denominator the total number of parts the last math lesson for this video is all about the 2d shapes it's going to be a blast we are going to investigate them one by one we're going to take you on a journey to discover the 2d shapes the easy ones and maybe some of the ones that maybe you don't know yet [Music] some of the 2d shapes are super easy and you'll be like i know all of these then some of the other shapes are a little more tricky and it's like i don't know if i've learned this before [Music] wait can we all agree that was a very weird sound and we should just probably never we should never record that kind of sound again yeah that was that was not that's not good all right 2d shapes let's go back to that okay so let's start here the trusty circle we love the circle right you gotta love circles circles are cool this is what a circle looks like here it is your basic circle you know this is what a circle looks like it looks like a really big dot doesn't it next let's look at this shape this shape is a triangle a triangle this is very interesting okay here it is again the triangle the triangle now triangles are easy to spot not just because you can learn what this shape looks like like this you can actually count the sides of the shape to discover that the shape is a triangle so let's count the sides together one two three this shape has three sides a triangle has three sides not all triangles look the exact same look at this triangle we know that this is a triangle because of its sides let's count them together one two three there are three sides every triangle has three sides it just looks more squished than the other triangle but it's still a triangle now here is something very interesting very interesting let's say we took the triangle and we stretched it out it's still a triangle right but if you did the same thing to the circle if you stretched out that circle it actually becomes a different shape a shape called what yeah an oval an oval when you stretch out a circle it becomes an oval and that's our third shape here it is again an oval an oval an oval is a stretched out circle basically right an oval you've seen these around right can you say that with us oval oval good let's look through these three shapes again just to make sure we really know them what is this shape yeah a triangle what's this shape do you know yeah it's an oval what's this shape yeah a circle okay what is this shape yeah it's an oval what is this shape uh-huh it's a triangle what is this shape yeah a circle now we're gonna get help from our friend clarence who's gonna show us the next four shapes okay the next four shapes all have one thing in common they have four sides four shapes that have four sides [Music] so let's meet these shapes the first one is this shape this shape is a square a square a very common very popular shape the next shape is this shape what is this shape do you already know yeah a rectangle a rectangle the next shape is not as popular and you might not be familiar with it this shape is a trapezoid oh that's a fun word to say can you say trapezoid wow trapezoid and the final shape is this one which is a parallelogram wow parallelogram first let's look closer at the square okay the square has four sides of course but all four of the sides are the same length okay so it looks like a perfect box doesn't it a square a square has four sides that are all the same length [Music] next we're going to take a closer look at the rectangle yeah rectangles are pretty cool they are usually drawn like stretched out squares aren't they it almost looks like a square that's been stretched out but a rectangle is any shape that has four sides and has four corners that look like these and they're usually drawn like this so they can be drawn differently they're usually drawn like a stretched out square next we are going to take a closer look at the trapezoid what a cool shape name trapezoid two of the sides are parallel to one another and the other two sides are not that's what makes a trapezoid a trapezoid you might be wondering what does parallel mean well let's show you we'll show you with these lines these lines are parallel to one another parallel lines are the same distance apart at every point they never move closer or further away let's look at our trapezoid again the top side and the bottom side those are parallel to one another because at every point they're the same distance from each other aren't they [Music] but what makes a trapezoid so unique is look at these two sides these two sides are not parallel to one another they're actually moving apart as you move down the shape don't they those sides are actually moving away from one another they are not parallel to one another that's what makes this shape a trapezoid okay clarence we hope you're ready the last four-sided shape that we're going to be looking closer at is the parallelogram and as the name might suggest it's named after the fact that the opposite sides of the parallelogram are always parallel to one another that's what makes a parallelogram a parallelogram a parallelogram can be drawn in many different ways but this is the most popular way to draw a parallelogram to draw almost like a rectangle that is having the wind blow really fast towards it so it's almost bending backwards it's almost looking like a slanted rectangle that is the way that a parallelogram is usually drawn okay so what's this shape do you remember yeah a square and what about this shape uh-huh a rectangle what about this shape uh-huh it's a parallelogram and what about this shape what's this uh-huh a trapezoid [Music] hey clarence thanks for helping us with oh are you brushing your teeth oh okay well good for you that's awesome thanks for helping and wow that's it's important to brush your teeth this is great i didn't know bears brushed their teeth but that's phenomenal that's great all right we we've got more shapes to cover here we gotta we gotta go sorry sorry clarence uh we're gonna we'll leave your bathroom now we only have three more shapes to show you the first is the pentagon the pentagon has five sides next is the hexagon the hexagon has how many sides six six sides a hexagon has six sides and the final shape we're showing you today is the octagon the octagon has eight sides eight sides you've seen these shapes before have you ever played soccer yeah you see two of the shapes in a soccer ball the white panels are hexagons each white panel is a hexagon and you can see there are six sides for each white panel on a soccer ball and each black panel is a pentagon there are five sides for every black panel on a soccer ball a soccer ball is covered in hexagons and pentagons you've also seen octagons in real life have you ever noticed that a stop sign is an octagon yeah a stop sign is an octagon it's a shape that has eight sides hey a special thumbs up to you you've done a great job in fact you've done so well we're gonna quiz you yeah we're gonna it's quiz time it's quiz time i hope you're ready i hope you're ready it's quiz time we're gonna find out how many of these shapes you can remember that you know it's gonna be awesome you're gonna do great you've been paying attention okay what is this shape if you need to count the sides go ahead what is this shape [Music] uh-huh this shape is an octagon good job okay here's the next one what is this shape what is this shape do you remember [Music] a trapezoid yeah what a fun name to say trapezoid this is a trapezoid two of the sides are parallel to one another and the other two sides are not parallel to one another [Music] okay let's try this shape what is this shape if you need to count up the sides what shape is this great job a pentagon a pentagon has five sides great job okay you're doing a great job you're doing a great job how about this shape okay how about this shape what shape is this yeah a triangle a triangle we know it's a triangle because it has how many sides [Music] three a triangle has three sides well done [Music] all right let's give this shape a whirl what shape is this what shape is this looks pretty cool but what shape is it do you remember [Music] uh-huh a parallelogram that one's fun to say too parallelogram can we say that together a parallelogram oh you can say it louder than that parallelogram oh come on one one more time one more time parallelogram great a parallelogram all right here is the last shape that we're going to quiz you on what is this shape [Music] you can count up the sides what kind of shape is this wow wow impressive yeah yeah this is a hexagon we know it's a hexagon because it has how many sides six sides yes wow very impressive that is so impressive well done that's great this is a hexagon because it has six sides special thanks to our patrons who make videos like this possible if you would like to support us and get cool homeschool pop tattoos click the link below this video or visit homeschoolpop.com as always you are awesome we hope to see you next video

Channel: Homeschool Pop

Views: 61,848

Keywords: cool math lessons, math lessons for kids, cool math lessons for kids, math lessons, math for kids, math videos for kids

Id: GRufA-FKLcc

Length: 53min 38sec (3218 seconds)

Published: Wed Apr 29 2020