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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 71 · 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. 1.59 × 15 =
  2. 2.38 × 15 =
  3. 3.32 × 15 =
  4. 4.38 × 15 =
  5. 5.57 × 15 =
  6. 6.24 × 15 =
  7. 7.59 × 15 =
  8. 8.32 × 15 =
  9. 9.13 × 15 =
  10. 10.26 × 15 =
  11. 11.10 × 15 =
  12. 12.31 × 15 =
  13. 13.41 × 15 =
  14. 14.39 × 15 =
  15. 15.19 × 15 =
  16. 16.6 × 15 =
  17. 17.27 × 15 =
  18. 18.12 × 15 =
  19. 19.10 × 15 =
  20. 20.18 × 15 =
  21. 21.16 × 15 =
  22. 22.16 × 15 =
  23. 23.63 × 15 =
  24. 24.47 × 15 =
  25. 25.46 × 15 =
  26. 26.9 × 15 =
  27. 27.29 × 15 =
  28. 28.13 × 15 =
  29. 29.32 × 15 =
  30. 30.58 × 15 =
  31. 31.24 × 15 =
  32. 32.63 × 15 =
  33. 33.52 × 15 =
  34. 34.33 × 15 =
  35. 35.5 × 15 =
  36. 36.21 × 15 =
  37. 37.40 × 15 =
  38. 38.45 × 15 =
  39. 39.48 × 15 =
  40. 40.42 × 15 =

Answer key

  1. 885
  2. 570
  3. 480
  4. 570
  5. 855
  6. 360
  7. 885
  8. 480
  9. 195
  10. 390
  11. 150
  12. 465
  13. 615
  14. 585
  15. 285
  16. 90
  17. 405
  18. 180
  19. 150
  20. 270
  21. 240
  22. 240
  23. 945
  24. 705
  25. 690
  26. 135
  27. 435
  28. 195
  29. 480
  30. 870
  31. 360
  32. 945
  33. 780
  34. 495
  35. 75
  36. 315
  37. 600
  38. 675
  39. 720
  40. 630

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