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Three-Digit Numbers: Use rounding to estimate answers

In this worksheet, students estimate the answer to an addition by rounding off numbers to the nearest hundred or ten.

'Three-Digit Numbers: Use rounding to estimate answers' worksheet

Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Estimate Calculations and Check Answers

Difficulty level:  

Worksheet Overview

In this worksheet, we will learn about estimation by rounding numbers to the nearest hundred or ten.

 

Example

Round these numbers off to the nearest hundred so that the answer can be estimated

321 + 689   can be rounded off to  
A
 + 
B

 

Estimated answer is C

 

Answer 

A     321 rounds down to 300 to the nearest hundred

B     689 rounds up to 700 to the nearest hundred

C     300 + 700 = 1000

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