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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 885 · 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. 1.47 × 15 =
  2. 2.29 × 15 =
  3. 3.17 × 15 =
  4. 4.60 × 15 =
  5. 5.14 × 15 =
  6. 6.33 × 15 =
  7. 7.33 × 15 =
  8. 8.35 × 15 =
  9. 9.14 × 15 =
  10. 10.13 × 15 =
  11. 11.8 × 15 =
  12. 12.45 × 15 =
  13. 13.6 × 15 =
  14. 14.58 × 15 =
  15. 15.35 × 15 =
  16. 16.35 × 15 =
  17. 17.22 × 15 =
  18. 18.46 × 15 =
  19. 19.11 × 15 =
  20. 20.19 × 15 =
  21. 21.5 × 15 =
  22. 22.43 × 15 =
  23. 23.28 × 15 =
  24. 24.20 × 15 =
  25. 25.43 × 15 =
  26. 26.49 × 15 =
  27. 27.6 × 15 =
  28. 28.26 × 15 =
  29. 29.64 × 15 =
  30. 30.19 × 15 =
  31. 31.36 × 15 =
  32. 32.22 × 15 =
  33. 33.40 × 15 =
  34. 34.25 × 15 =
  35. 35.64 × 15 =
  36. 36.51 × 15 =
  37. 37.29 × 15 =
  38. 38.48 × 15 =
  39. 39.12 × 15 =
  40. 40.6 × 15 =

Answer key

  1. 705
  2. 435
  3. 255
  4. 900
  5. 210
  6. 495
  7. 495
  8. 525
  9. 210
  10. 195
  11. 120
  12. 675
  13. 90
  14. 870
  15. 525
  16. 525
  17. 330
  18. 690
  19. 165
  20. 285
  21. 75
  22. 645
  23. 420
  24. 300
  25. 645
  26. 735
  27. 90
  28. 390
  29. 960
  30. 285
  31. 540
  32. 330
  33. 600
  34. 375
  35. 960
  36. 765
  37. 435
  38. 720
  39. 180
  40. 90

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