ppt, 1.86 MB
ppt, 1.86 MB
A simple, elegant step by step introduction to subtraction in columns.

Starts off with two colums, builds up to two columns where we need to borrow some tens and then continues until three columns where we need to borrow twice.

Very clear guide, no room for misunderstanding. 8 slides with many actions built in to each slide to show exactly what needs to be done.

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