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Least Common Multiple (LCM) Worksheets

Find the smallest number that both numbers divide into.

Grade 5 Grade 6

Printable worksheet

Least Common Multiple (LCM)

Name:Date:Score:

Find the least common multiple (the smallest number that both numbers divide into).

  1. 1LCM of 7 and 3 =
  2. 2LCM of 7 and 4 =
  3. 3LCM of 11 and 3 =
  4. 4LCM of 9 and 6 =
  5. 5LCM of 8 and 4 =
  6. 6LCM of 5 and 8 =
  7. 7LCM of 9 and 11 =
  8. 8LCM of 8 and 5 =
  9. 9LCM of 11 and 3 =
  10. 10LCM of 7 and 12 =
  11. 11LCM of 8 and 3 =
  12. 12LCM of 6 and 2 =

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Answer key — Sheet A (12 answers)
  1. 1. 21
  2. 2. 28
  3. 3. 33
  4. 4. 18
  5. 5. 8
  6. 6. 40
  7. 7. 99
  8. 8. 40
  9. 9. 33
  10. 10. 84
  11. 11. 24
  12. 12. 6

About this skill

The LCM becomes the common denominator when adding unlike fractions.

How to teach it

Mistakes to watch for

Where to go next

All Factoring & Prime Factors Worksheets →