Column addition, two 2-digit numbers: missing addend

Adding 2-digit numbers in columns

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Printed on the worksheet and the reward star. We never save it.

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Problems

Numbers to add

Digits in each number

Regrouping (carrying)

Regrouping means carrying from one column into the next, like ones into tens.

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Sheet

Number of problems

Up to 25 fit on one page with these choices.

Worked example

Pictures

Game

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Reward star

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