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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 443 · 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. 1.58 × 15 =
  2. 2.33 × 15 =
  3. 3.7 × 15 =
  4. 4.8 × 15 =
  5. 5.33 × 15 =
  6. 6.61 × 15 =
  7. 7.17 × 15 =
  8. 8.14 × 15 =
  9. 9.17 × 15 =
  10. 10.20 × 15 =
  11. 11.16 × 15 =
  12. 12.58 × 15 =
  13. 13.5 × 15 =
  14. 14.50 × 15 =
  15. 15.38 × 15 =
  16. 16.35 × 15 =
  17. 17.14 × 15 =
  18. 18.42 × 15 =
  19. 19.43 × 15 =
  20. 20.61 × 15 =
  21. 21.22 × 15 =
  22. 22.8 × 15 =
  23. 23.17 × 15 =
  24. 24.5 × 15 =
  25. 25.57 × 15 =
  26. 26.10 × 15 =
  27. 27.5 × 15 =
  28. 28.33 × 15 =
  29. 29.7 × 15 =
  30. 30.62 × 15 =
  31. 31.47 × 15 =
  32. 32.63 × 15 =
  33. 33.7 × 15 =
  34. 34.23 × 15 =
  35. 35.31 × 15 =
  36. 36.55 × 15 =
  37. 37.16 × 15 =
  38. 38.23 × 15 =
  39. 39.64 × 15 =
  40. 40.57 × 15 =

Answer key

  1. 870
  2. 495
  3. 105
  4. 120
  5. 495
  6. 915
  7. 255
  8. 210
  9. 255
  10. 300
  11. 240
  12. 870
  13. 75
  14. 750
  15. 570
  16. 525
  17. 210
  18. 630
  19. 645
  20. 915
  21. 330
  22. 120
  23. 255
  24. 75
  25. 855
  26. 150
  27. 75
  28. 495
  29. 105
  30. 930
  31. 705
  32. 945
  33. 105
  34. 345
  35. 465
  36. 825
  37. 240
  38. 345
  39. 960
  40. 855

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