How to use this sheet

  • Have the child estimate each answer first, so a wrong answer stands out.
  • Work the problem again on scrap paper, then compare it with the one on the sheet, step by step.
  • Ask the child to say the mistake out loud before writing it: "The ones made 13, and the 1 was not carried."

Common mistakes

  • Marking an answer right because it looks neat or finished.
  • Finding the wrong answer but not the step where it went wrong.
  • Fixing the answer without saying what went wrong, so the same mistake comes back.

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