At this point I think you

know a little bit about what multiplication is. What we’re going to do in this

video is to give you just a ton of more practice and start you

on your memorization of the multiplication tables. And if you watch enough Khan

Academy videos, and hopefully you will in the future, you’ll

realize that I’m normally not a big fan of memorization. But the one thing about

multiplication is if you memorize your multiplication

tables that we’ll start to do in this video, it’ll pay huge

benefits the rest of your life. So I promise you, do it now,

you’ll never forget it, and the rest of your life everything

will be– well, I don’t want to make false promises to you, but

they’ll be better than if you didn’t memorize your

multiplication tables. So what are the

multiplication tables? Well that’s all of the

different numbers times each other. So let’s actually do a

little bit of review. So if I say what is 2 times 1? That is equal to 2

plus itself one time. So this is equal to just 2. That’s 2 plus itself one time. I don’t have to say plus

anything because there’s only one 2 there. I could also write this as

1 plus itself two times. So that’s also 1 plus 1. Well that also equals 2. Fair enough. So 2 times 1 is 2. And if you watched the last

video, what’s 2 times 0? Well that’s 0. So you don’t have to memorize

your 0 multiplication tables because everything times 0 is

0, or 0 times anything is 0. So let’s see. What’s 2 times 2? Well, this is equal to–

we’re going to add 2 to itself two times. So that’s 2 plus 2. And there’s only a

way to do that. I could say take this 2 and

add it to itself two times, but it’s the same thing. And what’s 2 plus 2? That’s equal to 4. What’s 2 times 3? 2 times 3 is equal

to 2 plus 2 plus 2. It can also be

equal to 3 plus 3. We learned in a previous video

this statement can be written either of these ways. And in either case,

what’s it equal to? Well, 3 plus 3 is the same

thing as 2 plus 2 plus 2, and that’s equal to 6. All right. Now what is 2 times 4? Well that’s equal to 2

plus 2 plus 2 plus 2. And notice, it’s exactly

what 2 times 3 was. 2 times 3 was that. I have that here, but now I’m

just adding another 2 to it. So if we’re too lazy to sit

here and add 2 plus 2 is 4. 4 plus 2 is 6. Instead of doing that, we could

say, hey look, we already know that this thing over

here, this was 6. We figured it out in the

previous line right there. We figured out this is 6, so we

could just say, oh, 2 times 4 is going to be 2 more than

that, which is equal to 8. And you should hopefully

see that pattern. As we go from 2 times 1,

to 2 times 2, to 2 times 3, what’s happening? How much are we going up by? From 2 to 4 we’re going plus 2. From 4 to 6 we’re going plus 2. And then from 6 to 8

we’re going plus 2. So you could figure out what

2 times 5 is, even without doing the addition. 2 times 5 is equal to 2 plus

2 plus 2 plus 2 plus 2. It could also be

written as 5 plus 5. 2 times 4 could’ve been

written as 4 plus 4 as well. And what’s that equal to? We could add all of these up

or we could add these two up. Or we could just say it’s going

to be two more than 2 times 4. So it’s going to be 10. I’ll finish the 2 times tables. And I think you see all of the

patterns that emerge from it. So 2 times 6. That’s going to be 2

plus itself six times. Let’s see. 1, 2, 3, 4, 5, 6, which

should also be equal to 6 plus itself two times. This could be

interpreted either way. And that’s going to

be equal to 12. Once again, two more than 2

times 5 because we’re adding 2 to itself one more time. So it’s going to be two more. Let’s keep going. So 2 times 7. 2 times 7 is equal to– well, I

could write 2 plus 2 plus 2 plus 2– this is getting

tiring– plus 2 plus 2. Is that 7? 1, 2, 3, 4, 5, 6, 7. And that’s the same thing as 7

plus 7, which you may or may not know is equal to 14. You could just say hey, that’s

going to be two more than 12. So 12 plus 1 plus 2

is– 12 plus 1 is 13. 12 plus 2 is 14. All right, let’s

just keep going. 2 times 8. I could do all of this business

here where I add the 2’s or I could say look, it’s just going

to be two more than 2 times 7. So I could say it’s

going to be 14 plus 2. I’m just adding

two to that one. So I could say it’s 16. Or I could also say

that’s 8 plus 8. That’s also 16. I could have done all the 2’s

out, but if you like you could do that for your

own benefit and learning. We’re almost– well, we could

go forever because there is no largest number. I can keep going. 2 times 9 times 10 times 100

times 1,000 times 1,000,000. But I’m going to stop at 12

because that tends to be what people need to memorize. But if you really want

to be a mathlete you want to go up to 20. But let’s go to 2 times 9. That’s going to be two

more than 2 times 8. It’s going to be 18. Or that’s 9 plus 9. Also 18. What’s 2 times 10? And 10 times tables

are interesting. And we’re going to see a

pattern there in a second when we try to complete

an entire times tables. So 2 times 10? Two more than 2 times 9. It’s 20. Or we could also say

that’s 10 plus 10. 10 plus itself two times. Now what’s interesting

about this? This looks just like

a 2 with a 0 added. And you’re going to see

that anything times 10. You just put a 0 on the right. And you can think

about why that is. You can view this

as two 10’s is 20. That’s what 20 is. We’re almost done. Let’s do 2 times 11. 2 times 11 is going to be 2

more than this right here. It’s going to be 22. Another interesting pattern. I have the number repeated

twice– a 2 and a 2. Interesting. Something to watch out

for as we look at other multiplication tables. And then finally– it’s not

finally, we could keep going. 2 times– that’s too

dark of a color. 2 times 12. 2 times 12 is going to be

two more than 2 times 11. That’s 24. We could have also written

that as 12 plus 12. Or we could’ve said 2 plus

2 plus 2 plus 2 plus 2 twelve times. It all gets you to 24. So that’s the 2 times

tables and I think you see the pattern. Every time you multiply it by

one higher number you just add 2 to that number. So now that we see that

pattern, let’s see if we can complete a

multiplication table. So what I want to do, I’m going

to write all the numbers. Let’s see. I hope I have space for this. 1, 2, 3, 4, 5, 6, 7, 8, 9. Actually, I’ll just

do it till 9. I’ll just keep going. 9. Actually I won’t have space to

do that because I want you to see the entire table. So I’m just going up till

9 here, but I encourage you after this video to

complete it on your own. Maybe if we have time I’ll

complete it here as well. So these are the first numbers

that I’m going to multiply. And I’m going to multiply

it times 1, 2, 3, 4, 5, 6, 7, 8, and 9. Actually I should have

written this 1 under- well, what’s 1 times 1? So this is the way I’m

going to view it. Whatever is 1 times 1 I’m

going to write here. Well that’s 1. What’s 1 times 2? That’s 2. What’s 1 times 3? That’s 3. 1 times anything is that

number, so I can just write 4, 5, 6, 7, 8, 9. 1 times 9 is 9. Fair enough. Now let’s do the

2 times tables. I’ll do that in a blue. Actually, let me do 1 in that

color and now in maybe a darker blue I’ll do

the 2 times tables. What’s 2 times 1? That’s 2. It’s the same thing

as 1 times 2. Notice, these two numbers

are the same thing. What’s 2 times 2? That’s 4. 2 times 3 is 6. We just did this. Every time you increment or

you multiply by a higher number, you just add by 2. 2 times 4 is 8. Same thing as 4 times 2. 2 times 5 is 10. 2 times 6 is 12. I’m just adding 2 every time. Up here I added 1 from every

step, here I’m adding 2. 2 times 7, 14. 2 times 8, 16. 2 two times 9, 18. All right, let’s do

our 3 times tables. I’ll do it in yellow. 3 times 1 is 3. Notice, 3 times 1 is 3. 1 times 3 is 3. These are the same values. 3 times 2 is the same

thing as 2 times 3. 3 times 2 should be the

same thing as 2 times 3. So it’s 6. And that makes sense. 3 plus 3 is 6 or 2

plus 2 plus 2 is 6. So every time here we’re

going to increase by 3. You see the pattern. 3 times 3 is 9. 3 plus 3 plus 3. So we went from 3 to 6 to 9. So 3 times 4 is going to be 12. I’m just adding 3 every time. 12 plus 3 is 15. 15 plus 3 is 18. 18 plus 3 is 21. 21 plus 3 is 24. 24 plus 3 is 27. So 3 times 9 is 27. 3 times 8 is 24. So if you were to say 8 plus

8 plus 8, it would be 24. So now I’m going to speed it

up a little bit now that we see the pattern. And you should do this on your

own and you really should memorize everything

we’re doing. You should actually go

all the way up to 12 in both directions. So let’s see. 4 times 1 is 4. I’m just going to go up

by increments of 4. So 4 plus 4 is 8. 8 plus 4 is 12. 12 plus 4 is 16. 16 plus 4 is 20. 20 plus 4 is 24. 4 times 6 is 24. 4 times 7, 28. I’m just going up by 4. 32 and 36. All right, 5 times 1. 5 times 1 is going to be 5. Actually, we know that

anything– well, I want to keep changing colors, so I’ll just

do it in rows like this. 5 times 1 is 5. 5 times 2 is 10. 5 times 3 is 15. I’m just going to

increase by 5. 5 times tables are very fun as

well because every number you’re going to add– if we

multiply 5 times– well, we’ll learn about even and

odd in the future. But every other number in its

times tables is going to end with a 5, and then every other

one’s going to end with a 0. Because if you add 5

to 15 you get 20. You get 25, 30, 35, 40, 45. Fair enough. 6 times tables, let

me do it in green. 6 times 1 is 6. That’s easy. You add 6 to that, you get 12. You add 6 to that, you get 18. You add 6 to that, you get 24. You add 6 to that, you get 30. Then you go 6 more, 36, 42, 48. 48 plus 6 is 54. So 6 times 9 is 54. All right, we’re almost there. 7 times 1, that’s 7. 7 times 1 is 7. 7 times 2 is 14. 7 times 3, 21. 7 times 4, 28. 7 times 5, what’s 28 plus 7? Let’s see.

If you add 2 you get to 30. Then you have 5, 35. 7 times 6, 42. 7 times 7, 49. 7 times 8. Seven times is going to be

7 plus this, so it’s 56. I always used to get confused

between 7 times 8 being 56 and 6 times 9 being 54. So now that I pointed out to

you that I always got confused between those two, it’s your

job not to be confused by those two. 7 times 8 you could

say has the 6 in it. 6 times 9 doesn’t

have the 6 in it. That’s the way I think of it. Anyway, 7 times 9. We’re going to add

another 7 here. It’s going to be 63. I’ll do it in the same color. All right, we’re at

our 8 times tables. 8 times 1 is 8. 8 times 2 is 16. 24. 8 times 3 is 24. And if we go to 3 times 8

we should also see the 24. Yep, it’s there. These values are the same. So we’re actually

doing things twice. We’re doing it when you do

8 times 3 and we’re doing it when we did 3 times 8. Let’s see. 8 times 4, you’re going

to add 8 to it– 32. 40. Add another 8, 48. Notice, 8 times 6, 48. 6 times 8, 48. All right, 8 times 7. Well, we already pointed

that one out, that was 56. 8 times 8, 64. 8 times 9, add 8

to this, is 72. Now we’re at the

9 times tables. I’m running out of colors. Maybe I’ll reuse

a color or two. I’ll use the blue again. 9 times 1 is 9. 9 times 2, 18 9 times 3– we

actually know all of these. We could look it up in the rest

of the table because 9 times 3 is the same thing as 3 times 9. It’s 27. Add 9 to that. 27 plus 9 is 36. 36 plus 9 is 45. Notice, every time you add

9, you go almost up by 10, but 1 less than that. So up by 10 would be 46, and

then one less than that is 45. But anyway, notice, the

1’s– well, I’ll talk more about it in the future. But we go from a 9, 8,

7, 6, 5 on this digit, on the second digit. And on this digit here

you go 1, 2, 3, 4. So it’s an interesting pattern. Another interesting pattern is

the digits will add up to 9. 3 plus 6 is 9, 2 plus 7 is 9. We’ll talk more about that

in the future and maybe prove that to you. 9 times 6, 54. That was this one as well. 9 times 7, 63. 9 times 8, 72. 9 times 9 is 81. I don’t know if

you can see that. 81. There you go. Now, I could keep going. Actually, I should keep going. Well, I realize this video

is already pretty long. I want you to memorize this

right now because this is going to get you pretty far. In the next video I’m going to

do the times tables past 9. See you soon.

Oh, and when you have to multiply 9, here is a trick. Lets say you have 4×9. hold up both of your hands. now,on you first hand, count to your fourth finger. Put your fourth down.You should have 3 on your left hand and 6 on the other, therefore your answer is 36. It'll work with anything times 9…

I do not like this.

fuck you dislikers

Math is great especially when it is fun! Check out my math video's that are crazy funny. They are a great addition to Khanacademy. Put them both together and you have a winner. Check my videos out and you'll see. ๐

How can I tell if I have them memorized or not? Lol? I never attempted to memorize them, but I've used them a lot.

What's the different between 2×2 and 2+2?

Great video! It helped me a lot! Woohoot!

You just need to know 1-9 multiplication table, because even if its in the trillions, you don't need 10×20=200 or something. 0x0 is so hard! =D

Weew, here I am a out of college but still haven't memorized this. If only my elementary teachers made the subject more interesting. LOLZ

really ? how did you get past the SAT much less college ?

me and math have never been friends .we just didn't get along.

at first i was like my life sucks i dont know my times tables before high school and now im all like i know kung fu

2×2=4.2+2=4

nice knowledge

thanks allot im going to third grade and i was like every one else nows multiplication im to dumb but now im to smart:D

Great way to learn math!

Thank you for uploading this!Its thanks to Khan Academy that i can Memorize my times tables!I watch this for until i can remember my Times Tables! ๐

Im in 8th grade and today I realized I forgot my multiplication facts! I was sooo embarrassed in math class. Thanks for uploading is!

I'm only in 3rd grade and I don't know my 3,4,6,7,8,9

And can you make more videos

I now my ร and รท

:):):):):):):):):p

72×2=36

Thanks I really need this every one is breaking there backs to help me **_

think you

best learning video ever

#ย wow

normal the dislike button didn't work

๐ฎ wow

im watching this for fun X) I know this already lol

Pretty helpful

What tool did you use do to this?

ย

Is it a paint tool?ย

Very Helpful

It helps

Thanks Khan academy already know but helpful

loolooooooooooooooooooooooooooooooooolololololololololololoololollolololo tollolololololololololololoolololllllllllllllllllllllllllllllllllllllo#lolololololololololohahahahahahaahahdia bug

omg so COOL

You are good you help people

I don't like this one but I like the first one that you lrean something that what I think

i hate you my teacher makes me do khan academy

Thanks khan academy

;D.

your so COOL! but I only learn a bit. but still COOL!

uggh.

Great stuff! I flipped with little learners in Finland. You can find the videos and link to the abstract of my research from my channel. Hope you find them useful and interesting!

great

table and chairs and the best way for me to be the first time in the morning and evening of my favorite part was the first time in the morning of the most important thing

multiple cation tables

i am learning already and you are helping i love your videos

cool

Khan academy, Sal thanks

I don't like this lol

so many 2's

Thanks Khan i memorized my multiplication table, six months later i got a car and a house. Viva Khan Academy

I like this

so bad

you are boring

You guys are awesome I'm only nine

i always do khan academy!!!

Tola you are racist why would you ask one of the smartest men in the world that question

i dont like this

be greatful hes peeps

take out the hes

ffurtytftftrtgrdfddfghgfdfgtrffrrfcccccccccccccccccccdddddddddddddddddddddddddddddttttttttttttttcccccccccccccccdxtcftccrcrrrcrcrfrfctctctctthghhfrtfvghfdcrsexazwxsecsexwqsedrcfvgbhnjigbufvydtrdesrxdcftg7y8uijkjkhgvfcvgbhnjmkll.k,mjnm,kl..lkjmnhbgvfcdfvgbhnhngbfvdcsxdfgbgbfdsazzsdcfvgbvfcdsxazsxdcfvgbhnhbgvfcdsxazsxdcfvgbfvdreswedfgbfdesdfvbghngfdrgbhngbfvdcfvbnhbgvfcdfvgbhbgfvdctvfbghngbfvbbgvfvbgvfbgvfjbvh bbvcftfrdtcdfdtcsxxdcfv

๐

This really helped me

I'm in 3 grade

๐

This was better than the last one ๐

i hat multiplicahon

The 5 is like counting by 5?

I badly dislike math BADLY!!!!!

I hate khan academy my mom wont let me play anything but this

๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท๐ฐ๐ท

U helped my cosinn with her multplcation

I think you need to make more multiplication videos but so far I love your videos

loving it so far๐บ๐๐

Helps me learn great I love math I am only 8 and I am intelligence because of khan academy โค๏ธโค๏ธโค๏ธโค๏ธโค๏ธโค๏ธ

No I am 9 that is my sis she wants to share accounts

๐๐๐๐ฎ

This guy needs to do audiobooks!

I love your videos they help me so much thanks

2

Thanks Man U helped a lot thx

Don't ever prescribe memorization in academia, especially not in math.

2222

Thanks but ill try again ;————;

You are the best math teacher ever I love you khan

Mathlete xD

Learning is the sine of life

If u learn something it means u have life

Thanx sir ur vdo is great

I like it

This really helps

I love this video

Hi

4

Good

I am very bad at division

Thank you but can you do something a little more fun that was boing

I dident mean to be mean sory๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ฉ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ญ๐ฉ๐ฉ๐ฉ

Thanks for helping me

I will get a test tomorrow (thrustday

I hope i will get 100 or A+

=3