pdf, 102.86 KB
pdf, 102.86 KB

Children subtract up to 4-digit numbers, with one exchange. They complete the formal written method alongside any visual resources to support understanding. Before subtracting each column, ask,
Do you have enough ones/tens/hundreds to subtract ____ ?
If not, then an exchange is needed.
The exchange could take place from the tens, hundreds or thousands, but there is only one exchange per calculation

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