A selection of our very best maths resources entirely free, updated each month.
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Count back in tens from 3-digit numbers.
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Try taking away a single digit from a 3-digit number. These include taking away from whole hundreds which can be quite tricky.
Sometimes quite tricky subtractions can be made easy by counting up. Have a look at these to see why.
More subtraction by counting on.
Skills to help with fast mental arithmetic.
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