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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 222 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.44 × 15 =
  2. 2.53 × 15 =
  3. 3.7 × 15 =
  4. 4.30 × 15 =
  5. 5.32 × 15 =
  6. 6.61 × 15 =
  7. 7.14 × 15 =
  8. 8.11 × 15 =
  9. 9.14 × 15 =
  10. 10.13 × 15 =
  11. 11.59 × 15 =
  12. 12.34 × 15 =
  13. 13.60 × 15 =
  14. 14.6 × 15 =
  15. 15.60 × 15 =
  16. 16.62 × 15 =
  17. 17.28 × 15 =
  18. 18.20 × 15 =
  19. 19.10 × 15 =
  20. 20.38 × 15 =
  21. 21.41 × 15 =
  22. 22.40 × 15 =
  23. 23.55 × 15 =
  24. 24.41 × 15 =
  25. 25.30 × 15 =
  26. 26.12 × 15 =
  27. 27.17 × 15 =
  28. 28.10 × 15 =
  29. 29.38 × 15 =
  30. 30.16 × 15 =
  31. 31.16 × 15 =
  32. 32.41 × 15 =
  33. 33.57 × 15 =
  34. 34.8 × 15 =
  35. 35.14 × 15 =
  36. 36.27 × 15 =
  37. 37.36 × 15 =
  38. 38.11 × 15 =
  39. 39.7 × 15 =
  40. 40.60 × 15 =

Answer key

  1. 660
  2. 795
  3. 105
  4. 450
  5. 480
  6. 915
  7. 210
  8. 165
  9. 210
  10. 195
  11. 885
  12. 510
  13. 900
  14. 90
  15. 900
  16. 930
  17. 420
  18. 300
  19. 150
  20. 570
  21. 615
  22. 600
  23. 825
  24. 615
  25. 450
  26. 180
  27. 255
  28. 150
  29. 570
  30. 240
  31. 240
  32. 615
  33. 855
  34. 120
  35. 210
  36. 405
  37. 540
  38. 165
  39. 105
  40. 900

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