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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 492 · 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. 1.7 × 15 =
  2. 2.58 × 15 =
  3. 3.62 × 15 =
  4. 4.51 × 15 =
  5. 5.58 × 15 =
  6. 6.60 × 15 =
  7. 7.11 × 15 =
  8. 8.14 × 15 =
  9. 9.48 × 15 =
  10. 10.5 × 15 =
  11. 11.12 × 15 =
  12. 12.64 × 15 =
  13. 13.14 × 15 =
  14. 14.10 × 15 =
  15. 15.36 × 15 =
  16. 16.17 × 15 =
  17. 17.6 × 15 =
  18. 18.61 × 15 =
  19. 19.7 × 15 =
  20. 20.59 × 15 =
  21. 21.49 × 15 =
  22. 22.15 × 15 =
  23. 23.36 × 15 =
  24. 24.30 × 15 =
  25. 25.13 × 15 =
  26. 26.12 × 15 =
  27. 27.46 × 15 =
  28. 28.64 × 15 =
  29. 29.46 × 15 =
  30. 30.39 × 15 =
  31. 31.62 × 15 =
  32. 32.13 × 15 =
  33. 33.27 × 15 =
  34. 34.26 × 15 =
  35. 35.12 × 15 =
  36. 36.24 × 15 =
  37. 37.47 × 15 =
  38. 38.45 × 15 =
  39. 39.6 × 15 =
  40. 40.11 × 15 =

Answer key

  1. 105
  2. 870
  3. 930
  4. 765
  5. 870
  6. 900
  7. 165
  8. 210
  9. 720
  10. 75
  11. 180
  12. 960
  13. 210
  14. 150
  15. 540
  16. 255
  17. 90
  18. 915
  19. 105
  20. 885
  21. 735
  22. 225
  23. 540
  24. 450
  25. 195
  26. 180
  27. 690
  28. 960
  29. 690
  30. 585
  31. 930
  32. 195
  33. 405
  34. 390
  35. 180
  36. 360
  37. 705
  38. 675
  39. 90
  40. 165

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