Use the relationship between addition and subtraction

Using knowledge of the relationship between addition and subtraction, but in some of these questions, you need to adjust the numbers a little to give you the correct answers.

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5 pages

Add and subtract decimals by adjusting (1)

Start by subtracting 0.9 from numbers and then move on to adding or subtracting 1.9, 2.9 using the same technique.

5 pages

Add and subtract decimals by adjusting (2)

More adding and subtracting of decimals using adjustment to the nearest whole number to make them easier.

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Subtraction of decimals

Work out mentally the answers to these sets of subtraction sums. For some, write down the method used to do it.

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Mixed addition and subtraction of decimals

A variety of addition and subtraction of decimals questions. Take time to ensure they are all correct.

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