Lesson: Estimating Differences between Three-Digit Numbers: Rounding Mathematics • 3rd Grade

In this lesson, we will learn how to round to the nearest ten or hundred to estimate the value of differences with numbers up to 1000.

Lesson Video

Q1:

Which number is nearest to ?

Q2:

Look at how Jackson rounded to estimate this difference.

Round the numbers in this calculation to the nearest ten.

Calculate the estimate.

Q3:

Look at how Olivia rounded to estimate this difference.

Round the numbers in this calculation to the nearest hundred.

Calculate the estimate.