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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 747 · 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. 1.37 × 15 =
  2. 2.47 × 15 =
  3. 3.48 × 15 =
  4. 4.5 × 15 =
  5. 5.34 × 15 =
  6. 6.45 × 15 =
  7. 7.60 × 15 =
  8. 8.64 × 15 =
  9. 9.57 × 15 =
  10. 10.55 × 15 =
  11. 11.62 × 15 =
  12. 12.37 × 15 =
  13. 13.57 × 15 =
  14. 14.9 × 15 =
  15. 15.40 × 15 =
  16. 16.62 × 15 =
  17. 17.22 × 15 =
  18. 18.13 × 15 =
  19. 19.63 × 15 =
  20. 20.45 × 15 =
  21. 21.42 × 15 =
  22. 22.52 × 15 =
  23. 23.9 × 15 =
  24. 24.15 × 15 =
  25. 25.13 × 15 =
  26. 26.5 × 15 =
  27. 27.46 × 15 =
  28. 28.32 × 15 =
  29. 29.16 × 15 =
  30. 30.21 × 15 =
  31. 31.17 × 15 =
  32. 32.47 × 15 =
  33. 33.4 × 15 =
  34. 34.46 × 15 =
  35. 35.27 × 15 =
  36. 36.52 × 15 =
  37. 37.25 × 15 =
  38. 38.28 × 15 =
  39. 39.14 × 15 =
  40. 40.62 × 15 =

Answer key

  1. 555
  2. 705
  3. 720
  4. 75
  5. 510
  6. 675
  7. 900
  8. 960
  9. 855
  10. 825
  11. 930
  12. 555
  13. 855
  14. 135
  15. 600
  16. 930
  17. 330
  18. 195
  19. 945
  20. 675
  21. 630
  22. 780
  23. 135
  24. 225
  25. 195
  26. 75
  27. 690
  28. 480
  29. 240
  30. 315
  31. 255
  32. 705
  33. 60
  34. 690
  35. 405
  36. 780
  37. 375
  38. 420
  39. 210
  40. 930

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