In these worksheets, children subtract up to 4-digit numbers with more than one exchange, using the written method of column subtraction. Children perform subtractions involving two separate exchanges
With extra reasoning sheet
with answer sheets
(for example, from the thousands and from the tens) as well as those with two-part exchanges
(for example, from the thousands down to the tens if there are no hundreds in the first number). To support
understanding, solve these subtractions alongside the concrete resources of base 10 and place value
counters. When completing the written method, it is vital that children are careful with where they put the digits, especially those that have been exchanged. Remember, two-part exchanges can be confusing for children if they are unsure what each digit represents or where to put it.
You can support the children with some questioning alongside their work, for example,
Do you need to make an exchange?
How can you subtract two numbers if one of them has fewer digits than the other?
If you cannot exchange from the tens/hundreds, what do you need to do?
Which column can you exchange from?
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