Speedy adding 9

Add 10 and subtract 1 to help answer these questions really quickly.

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Plenty of addition of a single digit to a 2-digit number, with the help of a 1-100 number square.

Clever tricks to add 9 quickly to any 2-digit number.

These can often be done by counting on.

Today we are going to look at a quick way that you can add 9 to a number.

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