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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 803 · 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. 1.33 × 15 =
  2. 2.63 × 15 =
  3. 3.52 × 15 =
  4. 4.14 × 15 =
  5. 5.32 × 15 =
  6. 6.43 × 15 =
  7. 7.34 × 15 =
  8. 8.25 × 15 =
  9. 9.27 × 15 =
  10. 10.40 × 15 =
  11. 11.25 × 15 =
  12. 12.49 × 15 =
  13. 13.16 × 15 =
  14. 14.55 × 15 =
  15. 15.60 × 15 =
  16. 16.25 × 15 =
  17. 17.59 × 15 =
  18. 18.39 × 15 =
  19. 19.5 × 15 =
  20. 20.23 × 15 =
  21. 21.44 × 15 =
  22. 22.47 × 15 =
  23. 23.64 × 15 =
  24. 24.15 × 15 =
  25. 25.32 × 15 =
  26. 26.14 × 15 =
  27. 27.21 × 15 =
  28. 28.25 × 15 =
  29. 29.6 × 15 =
  30. 30.25 × 15 =
  31. 31.51 × 15 =
  32. 32.33 × 15 =
  33. 33.7 × 15 =
  34. 34.49 × 15 =
  35. 35.11 × 15 =
  36. 36.28 × 15 =
  37. 37.28 × 15 =
  38. 38.50 × 15 =
  39. 39.51 × 15 =
  40. 40.62 × 15 =

Answer key

  1. 495
  2. 945
  3. 780
  4. 210
  5. 480
  6. 645
  7. 510
  8. 375
  9. 405
  10. 600
  11. 375
  12. 735
  13. 240
  14. 825
  15. 900
  16. 375
  17. 885
  18. 585
  19. 75
  20. 345
  21. 660
  22. 705
  23. 960
  24. 225
  25. 480
  26. 210
  27. 315
  28. 375
  29. 90
  30. 375
  31. 765
  32. 495
  33. 105
  34. 735
  35. 165
  36. 420
  37. 420
  38. 750
  39. 765
  40. 930

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