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Year 4 - Maths

Review constructing a whole when given a part and the number of parts

Review of fractions

Unit Summary

In this unit pupils will identify equal parts when they do not look the same related to equivalence. They will construct a whole when given a part and the number of parts.

Lesson Summary

You will learn to construct a whole when given a part and the number of parts.

Key Notes

  • When constructing a whole, you can start with the part.
  • To construct a whole, you need to know how many parts make it up and whether those parts are equal.
  • The whole can be one shape or a group of objects
  • Different shaped wholes can be constructed using the same shaped equal parts.

Vocabulary To Learn

  • Whole: The whole is all the parts or everything, the total amount.
  • Part: A part is some, but not all, of the whole.
  • Construct: Constructing something involves making something by joining parts together.

Common Mistakes To Avoid

  • Children may not include the original part when constructing a whole. E.g. if the given part is one of four equal parts of the whole, they may construct five parts together in total.

3 Quick Questions (With Answers)

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

When constructing a whole, you can start with the part. To construct a whole, you need to know how many parts make it up and whether those parts are equal.

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 may not include the original part when constructing a whole. E.g. if the given part is one of four equal parts of the whole, they may construct five parts together in total. Correction: How many parts does your whole have?

More Lessons In This Unit

Browse all guides in the Year 4 Maths guide library.