Maths In Minutes

How to Teach Formal Written Subtraction (Without Exchanging)

When you start introducing column subtraction, you'll want to begin with simple problems which don't involve any exchanging. In this clip you'll see how to model the written method alongside the steps on a place value chart, to help reinforce pupils' conceptual understanding.

Year 3


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More in this series: Addition and Subtraction: from Informal to Formal

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