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Addition and subtraction to 1,000
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(One number is always under 10)
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About this exercise
The exercise shows you two 3-digit numbers. Use the + and − buttons to choose whether to add or subtract. Type the answer into the box.
How to practise
Add or subtract the hundreds, then the tens, then the ones. When you regroup, remember: 10 ones make 1 ten, and 10 tens make 1 hundred.