# Question Video: Solving Word Problems Involving Multiplication by 10 Mathematics • 4th Grade

A girl has 10 stamp albums. If each album contains 264 stamps, how many stamps does she have?

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### Video Transcript

A girl has 10 stamp albums. If each album contains 264 stamps, how many stamps does she have?

When we solve word problems, we always begin by highlighting the key numbers. We know the girl has 10 albums. And each album contains 264 stamps. And the question asks us how many stamps she has altogether.

Now that we have the two numbers, we can begin to record the equation. We have number 10 and 264. We need to workout which operation to use. Each album contains 264 stamps. And the girl has 10 of them.

If we think of each album as a group, we can say she has 10 groups of 264. When we use the words “groups of”, that’s the same as multiplying. So our equation is 10 multiplied by 264, which is the same as 264 multiplied by 10.

Let’s see what happens to our number when we multiply it by 10. We can use the place value chart to help us. Our number has two hundreds, six tens, and four ones. When we multiply by 10, the number gets bigger and each digit will move one place to the left.

So two hundreds becomes two thousands, six tens becomes six hundreds, and four ones becomes four tens. And then we record a zero in the ones column. 264 multiplied by 10 is 2640. We found our answer by multiplying 264 by 10.

We used our place value chart to help us. And we learned that when we multiply a number by 10, it gets greater by the power of 10 and each digit will move one place to the left in the place value chart.