These lessons are to be used when first introducing the column method for subtraction. It builds upon previous methods of the number line and the expannded column subtraction.
I used this in a Year 4 class but it can also be used with Year 3 if that is the year they begin to use the method. It can also be adapted for Year 5 when modelling more than one exchange.
I am an advocate of using the CPA approach (concrete, pictoral and abstract) so this resource should be used alongide resources. I have included place value counters on the flipchart that can be moved easily. I would suggest using the base 10 resources as a scaffold for those learners who need to visually see the regrouping.
Finally, the ‘I Do, We Do, You Do’ are signals for teacher moedelling, whole class practice and independent practice.
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