How to use this sheet

  • Have the child estimate the answer first by rounding. An answer far from the estimate needs another look.
  • Use squared paper, or turn lined paper sideways, so each digit sits in its own column.
  • Add the ones column first, every time, and say "regroup" aloud whenever the column makes 10 or more.

Common mistakes

  • Forgetting the carried ten, so 47 + 38 becomes 75 instead of 85. Write the small 1 at the top of the next column before adding it.
  • Writing a two-digit total in the ones column, so 7 + 8 becomes 15 written under the ones. Write 5, and carry 1 ten.
  • Starting at the left column, then having to change the answer when a column regroups. Always start with the ones.
  • Lining up numbers of different lengths on the left, so 245 + 37 adds 3 to the hundreds. Line them up on the right.

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