How to Multiply Numbers Ending in Zeros

Multiplication Terms Review ⚡️

Let's say we need to multiply 7 x 100.

7 x 100 = ?

👉 In the last lesson, you learned how to multiply 7 x 10, but this is different. There's more than 1 zero!

So, what do you do? 🤔

👉 First, ignore the zeros in the factors, and multiply the non-zero digits.

7 x 1 = 7

👉 Next, count the zeros in 100.

There are 2.

👉 Then, add these zeros to the answer we just got.

That gives us 700.

And that's our final answer!

7 x 100 is equal to 700. ✅

Multiplying Numbers Ending in Zeroes Example

4 x 8,000 = ?

First, ignore the zeros in 8,000.

Go straight to multiplying 8 x 4.

8 x 4 = 32

Next, count the zeros in 8,000.

There 3 zeros!

Add these zeros to the product that you got.

So, what's our final answer?

4 x 8,000 = 32,000 ✅

Great work! 👏

Zeroes in Both Factors

Now, what if we have an equation like this:

20 x 6,000 = ?

We have even more zeros now.

Let's follow the same steps. 😎

First, ignore the zeros, and go right to multiplying 2 x 6.

2 x 6 = 12

Next, count the zeros from both factors.

There's 1 zero in 20.

There are 3 more zeros in 6000.

That makes 4 zeros.

Then, add these zeros to the answer that we got.

20 x 6,000 = 120,000!

Great work! 🎉

Now, try the practice! 😺🎖