Study Hub

Study Guides

This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.

Back to Study HubBrowse Year 3 Maths Guides

Year 3 - Maths

Add 3 numbers together using doubles and near doubles

Review strategies for adding and subtracting across 10

Unit Summary

In this unit pupils will be reviewing and securing previous knowledge of adding 3 addends, understanding they can be added in any order and combined in different ways to bridge through 10

Lesson Summary

You will learn to use doubles and near doubles to add three numbers.

Key Notes

  • Addition of 3 addends can be described by an aggregation story with 3 parts.
  • Number facts to 10 can help to add three small numbers.
  • Doubles and near doubles can help to add three small numbers together.

Vocabulary To Learn

  • double: Double means to become twice as many.
  • equation: An equation is used to show that one number or calculation is equal to another.
  • sum: The total when numbers are added together.

Common Mistakes To Avoid

  • Pupils do not understand that addition is commutative and are unable to 'swap' addends around.

3 Quick Questions (With Answers)

1. Solve this in steps: explain the method from this lesson and why each step matters.

Addition of 3 addends can be described by an aggregation story with 3 parts. Number facts to 10 can help to add three small numbers.

2. Use this key word in a maths sentence and explain it clearly. 'double'

Double means to become twice as many. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: Pupils do not understand that addition is commutative and are unable to 'swap' addends around. Correction: Use practical equipment and small numbers to show pupils that a sum is still the same even if values are added in different orders.

More Lessons In This Unit

Browse all guides in the Year 3 Maths guide library.