# Lesson: Estimating Sums of Three-Digit Numbers: Compatible Numbers Go Math! • Grade 3 • Common Core

MathematicsIn this lesson, we will learn how to use compatible numbers like 25, 50, 75, and 100 to estimate the value of sums up to 1000.

In this lesson, we will learn how to use compatible numbers like 25, 50, 75, and 100 to estimate the value of sums up to 1000.