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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 739 · 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. 1.7 × 15 =
  2. 2.8 × 15 =
  3. 3.11 × 15 =
  4. 4.15 × 15 =
  5. 5.31 × 15 =
  6. 6.19 × 15 =
  7. 7.62 × 15 =
  8. 8.20 × 15 =
  9. 9.28 × 15 =
  10. 10.40 × 15 =
  11. 11.20 × 15 =
  12. 12.53 × 15 =
  13. 13.24 × 15 =
  14. 14.54 × 15 =
  15. 15.57 × 15 =
  16. 16.15 × 15 =
  17. 17.4 × 15 =
  18. 18.13 × 15 =
  19. 19.47 × 15 =
  20. 20.11 × 15 =
  21. 21.58 × 15 =
  22. 22.5 × 15 =
  23. 23.60 × 15 =
  24. 24.62 × 15 =
  25. 25.15 × 15 =
  26. 26.30 × 15 =
  27. 27.41 × 15 =
  28. 28.39 × 15 =
  29. 29.8 × 15 =
  30. 30.53 × 15 =
  31. 31.36 × 15 =
  32. 32.31 × 15 =
  33. 33.55 × 15 =
  34. 34.46 × 15 =
  35. 35.64 × 15 =
  36. 36.36 × 15 =
  37. 37.43 × 15 =
  38. 38.14 × 15 =
  39. 39.9 × 15 =
  40. 40.33 × 15 =

Answer key

  1. 105
  2. 120
  3. 165
  4. 225
  5. 465
  6. 285
  7. 930
  8. 300
  9. 420
  10. 600
  11. 300
  12. 795
  13. 360
  14. 810
  15. 855
  16. 225
  17. 60
  18. 195
  19. 705
  20. 165
  21. 870
  22. 75
  23. 900
  24. 930
  25. 225
  26. 450
  27. 615
  28. 585
  29. 120
  30. 795
  31. 540
  32. 465
  33. 825
  34. 690
  35. 960
  36. 540
  37. 645
  38. 210
  39. 135
  40. 495

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