Using multiplication strategies to find products

- [Instructor] We're told
here is a partially completed

multiplication table, and we
can see they go all the way up

to the 4 times tables, I
guess you could call it that.

And they want us to figure
out what 8 times 6 is,

so pause this video, have a go at that

before we do this together.

Okay, so let's think
about where 8 times 6 is

on this multiplication table.

So if we say 6 times 8, it is over here,

because we know that 8 times 6

is the same thing as 6 times 8.

Or we could think about 8 times 6

exactly as it's written here,

which I would say is this
square right over here.

So what are ways that we could figure out

what goes in these?

And the same numbers should
go into both of these.

Well, one way is to look right over here

where they tell us what 4 times 6 is.

We see that 4 times 6 is equal to 24.

So based on that,

we could say 8 times 6 is going
to be twice as much as that.

So if we multiply this by 2,

or another way to think about it,

if we added another 24 over here,

we're going to get to 8 times 6.

So 24 plus 24, you might
recognize as being equal to 48.

So that's one way you
could have done that.

You could have said that is 48.

Another way that you
could have approached this

is you could have tried
to fill this one in

and you could have said,

"okay, if we're going down this column,

every time we go down
one, we're increasing by 8

'cause we're going larger
and larger multiples of 8.

So 8 times 5, we would add
8 again, we would get to 40,

and then if we add 8 another
time, we would get to 48."

So these are all ways to do it.

You could also go down
this column right over here

and add 6 every time.

And you could see that that would work.

If you add 6 to 24, you'd get 30.

Add 6 to that, you get 36.

Add 6 to that, 42.

Add 6 to that, you get to 48.