Subtraction 63 – 49 = 64 – 50 True or false? Explain why it works

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Presentation transcript:

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 Just to get you thinking about the nature of subtraction … 1

Acknowledgement: Leicestershire School Improvement Service 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

Acknowledgement: Leicestershire School Improvement Service - 323 - 149 - 324 - 150 - 374 - 200 Acknowledgement: Leicestershire School Improvement Service