How to use this sheet

  • Have the child draw a time line and make jumps: to the next hour first, then the rest.
  • Use a real clock to move the hands through each problem.
  • Ask the child to check that the answer makes sense: a lunch break is not 5 hours.

Common mistakes

  • Subtracting times like ordinary numbers, so 9:15 to 10:05 becomes 90 minutes. There are 60 minutes in an hour.
  • Crossing noon and getting lost. Jump to 12:00 first.
  • Mixing up "later" and "earlier", so the jump goes the wrong way.

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