way of multiplying two

two digit numbers together....so let's go!

First of all we'll see if you can multiply some numbers together

I'll give you a question which is

twenty-one

times

thirty one. I'll give you six seconds to work that out. Go!

So time's up.

So if you got the answer of 651 you did really really well

you got the right answer

If you were busily reaching for the calculator but couldn't find it in time bad luck

but you shouldn't need a calculator, and I'll show you how to work it out quickly

Don't get all despondant if you didn't work it out I'll show you how to work these out

So to get the first number of our answer we multiply the first

digits in our two numbers here, so 2 x 3

is six, and we have the first part of our answer

We leave a blank space.

To get the last number of our answer

we multiply the last digits of our two numbers here So 1 x 1 is 1.

To get the middle part of this number here there is a bit of a trick. What we do

is multiply

this number and this number

and this number and this number and we add the two answers together

so 1 x 2 is 2 1 x 3 is 3

we add 2 and 3 together and get the answer

six hundred fifty one

Hey, pretty easy 'eh?

We'll have a look at another one

So, what about 43

times 21, a little bit harder this time

See how you go. Have you got the answer yet?

I'll start working through this one.

So again

4 x 2 is 8

We leave the blank space

1 x 3 = 3

Then what we do is go...

remember this....

1 x 4, and we add this to 3 x 2 so

1 x 4 is 4

3 x 2

is 6

We add these together

We get the answer of 10

Now this leads to a problem, so this is a little trick for to understand

There is only one space here We only have space to fit one digit

So the digit it puts in out of this ten

is the zero, and for the one

We carry this across

And we add it on, so

The answer we end up getting

1 + 8 is

9

3...nine hundred and three.

Very good. I think we can go through one more

I'll rub that out and

let's have a look one more question

I think this time I'll do it in a nice

purple colour

and I'll do the question here

42

times

63

I'm going all out, using different colours today, getting excited

Too excited, I can't wait to get the answer - let's work it out

First number 4 x6 Leave a space.

is 24. Leave a space.

2 x 3 is 6

And then what we do

And I hope not to get this wrong. I had to remake the video earlier

as I stuffed up this one

Occassionally

I get all excited and I make mistakes too.

But for YouTube videos we don't make mistake. We always get 100% correct

OK

OK

We multiply

These two guys together. 4 x 3 is 12

6 x 2 is 12

And 12 + 12 is 24. We add 24 on, OK?

We put the 4 there and 2 there.

So what answer did we get?

Two thousan

six hundred

and forty six

Hey that's the right answer. Pretty cool right?

So if you practice these

you will get really good at them and really fast. Your teacher will be

utterly astounded about how good you are. Everyone will think

your a genius alright?

I mean don't go too far - people might stop talking to you

but hey -

you do this, you'll do really well.

And yes you may make a few mistakes. We all make them.

So finally I will leave you with a few questions

I'll write them, get you to pause the video and work through them, then I'll work through

the answers as quick as I can. Here they are.

22

times 34

I mean 32

see how you go on that one

fifty-one times

sixty three

and 82

times

fifty-one

pause the video

Then I'll get back to you

A couple of seconds and we'll go through these.

OK so hopefully you've worked through those

and we'll go through the answers right now.

OK so

2 x 3 is 6

We leave the blank space. 2 x 2 is 4 and then we add four

and six together

which is ten. We get the answer 704

The next one

5 x 6

is 30

Leave a space

1 x 3 is 3

and then we get

the number 3 x 5 is 15, 1 x 6 is

6

15 plus 6

is 21, so I'll put that in a different colour so it fits

This will be a one, and this will be a 2 so our answer is

three thousand

two hundred and thirteen

On to the last one

5 x 8

is forty

Leave a blank space

1 x 2 is 2

then we go 1 x 8 and we add that to 10

8 plus 10

is 18 - we put the 8 there and the one there.

So our answer is four thousand

one hundred and eighty two

I hope you did well on those. See you next time