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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 636 · 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. 1.28 × 15 =
  2. 2.57 × 15 =
  3. 3.15 × 15 =
  4. 4.15 × 15 =
  5. 5.29 × 15 =
  6. 6.42 × 15 =
  7. 7.36 × 15 =
  8. 8.40 × 15 =
  9. 9.6 × 15 =
  10. 10.57 × 15 =
  11. 11.64 × 15 =
  12. 12.44 × 15 =
  13. 13.13 × 15 =
  14. 14.48 × 15 =
  15. 15.39 × 15 =
  16. 16.53 × 15 =
  17. 17.23 × 15 =
  18. 18.26 × 15 =
  19. 19.54 × 15 =
  20. 20.39 × 15 =
  21. 21.27 × 15 =
  22. 22.33 × 15 =
  23. 23.33 × 15 =
  24. 24.42 × 15 =
  25. 25.7 × 15 =
  26. 26.47 × 15 =
  27. 27.44 × 15 =
  28. 28.44 × 15 =
  29. 29.34 × 15 =
  30. 30.22 × 15 =
  31. 31.44 × 15 =
  32. 32.54 × 15 =
  33. 33.62 × 15 =
  34. 34.13 × 15 =
  35. 35.4 × 15 =
  36. 36.41 × 15 =
  37. 37.33 × 15 =
  38. 38.19 × 15 =
  39. 39.37 × 15 =
  40. 40.15 × 15 =

Answer key

  1. 420
  2. 855
  3. 225
  4. 225
  5. 435
  6. 630
  7. 540
  8. 600
  9. 90
  10. 855
  11. 960
  12. 660
  13. 195
  14. 720
  15. 585
  16. 795
  17. 345
  18. 390
  19. 810
  20. 585
  21. 405
  22. 495
  23. 495
  24. 630
  25. 105
  26. 705
  27. 660
  28. 660
  29. 510
  30. 330
  31. 660
  32. 810
  33. 930
  34. 195
  35. 60
  36. 615
  37. 495
  38. 285
  39. 555
  40. 225

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