Solving multiplication word problems | 3rd grade math (Illustrative Math-aligned) | Khan Academy

- [Instructor] We're told a
pizza place makes seven pizzas.

Each pizza is cut into eight slices.

How many slices of pizza
are there in total?

Pause this video and
try to figure that out.

All right, now let's work
through this together.

So let's just imagine
each of those pizzas,

and each of them, we're
gonna cut into eight slices.

And we have seven of them.

So we could think about it like this.

So if you can imagine,

each circle here is one of those pizzas,

and each of those pizzas are split

into one, two, three, four,
five, six, seven, eight slices,

so, eight slices, and there's
seven of those pizzas,

one, two, three, four, five, six, seven.

So if you wanna know the
total number of slices,

you're essentially going to add
these seven eights together.

Well, adding seven
eights is the same thing

as multiplying eight by
seven or seven by eight.

Now, another way to think about it

is you could think about each

of those pizzas generating seven slices,

or actually, each of those
pizzas generating eight slices.

It was cut into eight slices,
and there's seven pizzas.

This is the first pizza,
gets these eight slices,

second pizza, these eight slices,

all the way to the seventh pizza.

Now, how many total slices there are?

Well, again, we see we
have seven rows of eight,

so we would just add all
of these eights together,

which is again, the same
thing as seven times eight

or eight times seven, which
if you were to add 'em all up,

or you might already know, is equal to 56.