Subtraction

63 – 49 = 64 – 50 True or false?

Explain why it works Could this be a successful mental method?

323 – 149 = 324 – 150 = 374 – 200 What representations might you use to support children’s conceptual understanding of the strategy?

Acknowledgement: Maths Specialist Teacher Programme- University of Northampton

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Acknowledgement: Leicestershire School Improvement Service

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323 - 149

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324 - 150

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374 - 200

Acknowledgement: Leicestershire School Improvement Service