Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Estimating Additions (2)

In this worksheet, students must estimate the answer to addition sums by rounding two numbers to the nearest hundred and then adding.

'Estimating Additions (2)' worksheet

Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Estimate and Check Answers

Difficulty level:  

Worksheet Overview

We can estimate the answer to an addition sum by rounding the numbers to the nearest hundred before we add.

 

Example 1

Estimate the answer to the following sum by rounding the numbers to the nearest hundred and then adding.

 

326 + 567

 

Answer

326 + 567

  ↓        ↓

300 + 600 = 900

 

Example 2

Estimate the answer to the following sum by rounding the numbers to the nearest hundred and then adding.

 

150 + 415

 

Answer

150 + 415

  ↓        ↓

200 + 400 = 600

 

Remember that 150 rounds up to 200, 350 rounds up to 400, 250 rounds up to 300 etc.

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started
laptop

Try an activity or get started for free

  • educational
  • bettfutures
  • cxa
  • pta
  • era2016
  • BDA award
  • Explore LearningTuition Partner
  • tacm