Addition practice

Addition with selected regrouping columns

Practice vertical addition where regrouping occurs in teacher-selected place-value columns and nowhere else.

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Add from right to left. Regroup in each selected column, record the carry, and confirm that unselected columns stay below ten.

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Learning objective

What this activity builds

Predict and perform regrouping in specified columns while checking the carry pattern across the whole problem.

Worked example

If only the ones column should regroup, does 247 + 136 fit?

Yes; the sum is 383.

Seven plus six is 13, so ones regroup. The tens column is 4 + 3 + 1 = 8 and the hundreds column is 2 + 1 = 3, so neither also regroups.

Teaching notes

Make the practice count

Predict the carry columns before calculating the full sum.
Include the incoming carry when deciding whether the next column also regroups.

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Add two to five addends with one-, two-, three-, or four-digit values in aligned vertical columns.

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