Add Decimals and Estimate the Answer (1)

In this worksheet, students estimate additions by rounding both decimals to the nearest whole numbers before adding them.

Key stage: KS 2

Curriculum topic: Maths and Numerical Reasoning

Curriculum subtopic: Decimals

Difficulty level:

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Worksheet Overview

Add Decimals and Estimate the Answer

We can estimate answers to complicated additions by rounding both decimals to the nearest whole numbers before adding them together.

Example 1

64.51 + 18.15 can be estimated by working out 65 + 18 = 83

Example 2

71.17 + 54.02 can be estimated by working out 71 + 54 = 125

Example 3

86.90 + 25.02 can be estimated by working out 87 + 25 = 112

Now, let's put this method into practise.

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Preview activity

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