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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 691 · 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. 1.25 × 15 =
  2. 2.25 × 15 =
  3. 3.38 × 15 =
  4. 4.6 × 15 =
  5. 5.48 × 15 =
  6. 6.25 × 15 =
  7. 7.50 × 15 =
  8. 8.48 × 15 =
  9. 9.47 × 15 =
  10. 10.57 × 15 =
  11. 11.17 × 15 =
  12. 12.63 × 15 =
  13. 13.15 × 15 =
  14. 14.35 × 15 =
  15. 15.29 × 15 =
  16. 16.48 × 15 =
  17. 17.49 × 15 =
  18. 18.25 × 15 =
  19. 19.5 × 15 =
  20. 20.22 × 15 =
  21. 21.9 × 15 =
  22. 22.38 × 15 =
  23. 23.7 × 15 =
  24. 24.45 × 15 =
  25. 25.21 × 15 =
  26. 26.55 × 15 =
  27. 27.32 × 15 =
  28. 28.32 × 15 =
  29. 29.7 × 15 =
  30. 30.46 × 15 =
  31. 31.11 × 15 =
  32. 32.8 × 15 =
  33. 33.49 × 15 =
  34. 34.11 × 15 =
  35. 35.12 × 15 =
  36. 36.22 × 15 =
  37. 37.4 × 15 =
  38. 38.29 × 15 =
  39. 39.46 × 15 =
  40. 40.49 × 15 =

Answer key

  1. 375
  2. 375
  3. 570
  4. 90
  5. 720
  6. 375
  7. 750
  8. 720
  9. 705
  10. 855
  11. 255
  12. 945
  13. 225
  14. 525
  15. 435
  16. 720
  17. 735
  18. 375
  19. 75
  20. 330
  21. 135
  22. 570
  23. 105
  24. 675
  25. 315
  26. 825
  27. 480
  28. 480
  29. 105
  30. 690
  31. 165
  32. 120
  33. 735
  34. 165
  35. 180
  36. 330
  37. 60
  38. 435
  39. 690
  40. 735

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