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Year 3 - Maths

Identify equal parts in a whole when they do not look the same in 3D contexts

Identify parts and wholes in different contexts

Unit Summary

In this unit pupils will identify parts and wholes in different contexts including sets of objects, 3-D shapes and linear contexts.

Lesson Summary

You will learn to identify equal parts in a whole when they do not look the same in 3D contexts.

Key Notes

  • Equal parts may not look the same.
  • The whole has been divided into __ equal parts.
  • One equal part has been filled so each equal part is __ of the whole.

Vocabulary To Learn

  • Whole: The whole is all the parts or everything, the total amount.
  • Part: A part is some of the whole.
  • Equal: Have the same quantity or value.
  • Unequal: Do not have the same quantity or value.

Common Mistakes To Avoid

  • Children might think that the parts of the whole they create in Task B have to be able to fit together to make the same shape as the whole.

3 Quick Questions (With Answers)

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

Equal parts may not look the same. The whole has been divided into __ equal parts.

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

The whole is all the parts or everything, the total amount. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: Children might think that the parts of the whole they create in Task B have to be able to fit together to make the same shape as the whole. Correction: Reinforce the concept that the whole is about quantity and not necessarily about shape. Plasticine is a good way to demonstrate this.

More Lessons In This Unit

Browse all guides in the Year 3 Maths guide library.