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Year 1 - Maths

Find and make amounts within 20 p

Unitising and coin recognition - value of a set of coins

Unit Summary

In this unit pupils will use knowledge of the value of coins and apply their number facts and counting skills to calculate the total value of the coins in a set of 2p 5p 10p coins. 

Lesson Summary

You will learn to calculate and make given amounts within 20 p.

Key Notes

  • A combination of different coins can be used to make the same total value.
  • It is more efficient to use fewer coins to pay for an item.
  • Using coins of a greater value where possible will result in fewer coins being used.
  • With prices between 10 p and 20 p, partitioning the price into '10 and a bit' allows more efficient working.

Vocabulary To Learn

  • Total value: Where referring to money, value refers to how much something is worth. The total value can be found by adding the value of each coin in a set.
  • Efficiently: Not wasting time or effort. An efficient strategy is one we can carry out easily.

Common Mistakes To Avoid

  • Children may start counting out using any coins available instead of thinking of the whole amount needed first and partitioning it into manageable parts where they can deploy known strategies.

3 Quick Questions (With Answers)

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

A combination of different coins can be used to make the same total value. It is more efficient to use fewer coins to pay for an item.

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

Where referring to money, value refers to how much something is worth. The total value can be found by adding the value of each coin in a set. 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 start counting out using any coins available instead of thinking of the whole amount needed first and partitioning it into manageable parts where they can deploy known strategies. Correction: Encourage children to partition teen numbers using a part-part-whole model and use what they know about making 10, and the numbers up to 10, to find combinations that use the fewest possible coins to total a given value.

More Lessons In This Unit

Browse all guides in the Year 1 Maths guide library.