Add tens and ones with number square

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

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Try adding a single digit to a multiple of 100. Four pages with the second pair getting quite difficult!

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

More adding to make the next whole ten.

These can often be done by counting on.

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