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Lesson: Estimating Sums and Differences: Numbers up to 1 000 000 Mathematics • 4th Grade

In this lesson, we will learn how to use rounding and compatible numbers to estimate sums and differences of numbers up to six digits.

Lesson Plan

Students will be able to

estimate sums and differences by rounding to any place value,
estimate sums and differences by rounding to the highest place value,
discuss what makes a better estimate.

Lesson Worksheet

Q1:

Estimate by rounding the two numbers to the nearest hundred thousand.

Q2:

The population of Delaware, a state in the United States, was 976,171 in 2018 and 876,794 in 2008. Estimate the increase of the population between the 2 years by rounding the two numbers to the nearest thousand.

Q3:

Estimate the result of the following by rounding both numbers to the nearest thousand: