By how much does a number change?

Each place has a value - 1, 10, 100, or 1000. When we put digits in these places they show how many ones, tens, hundreds, and thousands the number has in it.

If we change a digit, the number will change depending on what place that the digit was changed.

Let's look at by how much a number changed when these digits change.

We'll start with 247 and we'll change the 2 in the hundreds place to a 1.

247 minus 100 leaves 147

The number is now 147. It is a hundred less than 247. We took away 1 hundred.

Let's start with 422 and change the 4 to a 3.

422 minus 100 leaves 322

The number is now 322. It is a hundred less than 422. Again we took away 1 hundred.

This time we'll start with 571 and we'll change the 7 to a 3.

571 take away 4 tens leaves 531

The number is now 531. We took away 4 tens.

Also on

Prevent Bullying

Click the links below for information and help on dealing with bullying.

logo for Stomp out bullying campaign logo for National Bullying Helpline logo for logo for Bullying No Way site in Australia
By Subject > Place Value > More on Place Values)