# Estimating Sums and Differences (Whole Numbers) Worksheets

• ### Basic Lesson

Demonstrates how to estimate sums through the use of round estimation. Also includes practice problems. Estimate: 110 + 92 1. 110 Rounded to nearest whole number is 110. 2. 92 Rounded to nearest whole number is 90. Therefore, sum of 110 + 92 is 110 + 90 = 200.

• ### Intermediate Lesson

Uses a larger more difficult numbers to round than the basic lesson.

• ### Independent Practice 1

20 problems ask you to estimate sums and differences. The answers can be found below.

• ### Independent Practice 2

20 practice problems that review estimating sums and differences. The answers can be found below.

• ### Homework Worksheet

12 problems to reinforce the lessons and practice pages. An example is provided.

• ### Skill Quiz

10 problems that test sum and difference estimation skills.

• ### Homework and Quiz Answer Key

Answers for the homework and quiz.

• ### Lesson and Practice Answer Key

Answers for both lessons and both practice sheets.

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