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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 841 · 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. 1.63 × 15 =
  2. 2.41 × 15 =
  3. 3.40 × 15 =
  4. 4.13 × 15 =
  5. 5.19 × 15 =
  6. 6.60 × 15 =
  7. 7.9 × 15 =
  8. 8.8 × 15 =
  9. 9.13 × 15 =
  10. 10.37 × 15 =
  11. 11.18 × 15 =
  12. 12.30 × 15 =
  13. 13.51 × 15 =
  14. 14.47 × 15 =
  15. 15.6 × 15 =
  16. 16.38 × 15 =
  17. 17.11 × 15 =
  18. 18.58 × 15 =
  19. 19.29 × 15 =
  20. 20.51 × 15 =
  21. 21.64 × 15 =
  22. 22.58 × 15 =
  23. 23.18 × 15 =
  24. 24.62 × 15 =
  25. 25.63 × 15 =
  26. 26.6 × 15 =
  27. 27.18 × 15 =
  28. 28.28 × 15 =
  29. 29.40 × 15 =
  30. 30.18 × 15 =
  31. 31.6 × 15 =
  32. 32.28 × 15 =
  33. 33.57 × 15 =
  34. 34.52 × 15 =
  35. 35.29 × 15 =
  36. 36.36 × 15 =
  37. 37.64 × 15 =
  38. 38.26 × 15 =
  39. 39.22 × 15 =
  40. 40.24 × 15 =

Answer key

  1. 945
  2. 615
  3. 600
  4. 195
  5. 285
  6. 900
  7. 135
  8. 120
  9. 195
  10. 555
  11. 270
  12. 450
  13. 765
  14. 705
  15. 90
  16. 570
  17. 165
  18. 870
  19. 435
  20. 765
  21. 960
  22. 870
  23. 270
  24. 930
  25. 945
  26. 90
  27. 270
  28. 420
  29. 600
  30. 270
  31. 90
  32. 420
  33. 855
  34. 780
  35. 435
  36. 540
  37. 960
  38. 390
  39. 330
  40. 360

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