Round Numbers to the Nearest 100

In this activity, we will be rounding numbers to the nearest hundred to estimate the answer to an addition.

Example

Estimate the answer to the addition by first rounding both numbers to the nearest hundred.

543 + 781

A

+

B

=

C

Remember when rounding to the nearest hundred, look at the tens place.

If the number in the tens place is less than 5, round down! If the number in the tens place is 5 or more, round up!

Are you ready to get rounding?