Add a 3-digit number and a single digit (3C1)

Adding a single digit to a three-digit number with squared paper to help if necessary.

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Adding tens to a three-digit number with squared paper to help if necessary.

Questions asking to find 100 less than a given number with squared paper to help if necessary.

Questions asking to find 100 more than a given number with squared paper to help if necessary.

Add a 2-digit number to a 3-digit number.

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