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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 156 · 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. 1.5 × 15 =
  2. 2.41 × 15 =
  3. 3.53 × 15 =
  4. 4.19 × 15 =
  5. 5.62 × 15 =
  6. 6.60 × 15 =
  7. 7.19 × 15 =
  8. 8.15 × 15 =
  9. 9.36 × 15 =
  10. 10.36 × 15 =
  11. 11.22 × 15 =
  12. 12.33 × 15 =
  13. 13.31 × 15 =
  14. 14.12 × 15 =
  15. 15.43 × 15 =
  16. 16.28 × 15 =
  17. 17.13 × 15 =
  18. 18.32 × 15 =
  19. 19.48 × 15 =
  20. 20.42 × 15 =
  21. 21.35 × 15 =
  22. 22.5 × 15 =
  23. 23.45 × 15 =
  24. 24.35 × 15 =
  25. 25.28 × 15 =
  26. 26.6 × 15 =
  27. 27.35 × 15 =
  28. 28.42 × 15 =
  29. 29.64 × 15 =
  30. 30.53 × 15 =
  31. 31.10 × 15 =
  32. 32.6 × 15 =
  33. 33.42 × 15 =
  34. 34.54 × 15 =
  35. 35.17 × 15 =
  36. 36.18 × 15 =
  37. 37.39 × 15 =
  38. 38.32 × 15 =
  39. 39.28 × 15 =
  40. 40.50 × 15 =

Answer key

  1. 75
  2. 615
  3. 795
  4. 285
  5. 930
  6. 900
  7. 285
  8. 225
  9. 540
  10. 540
  11. 330
  12. 495
  13. 465
  14. 180
  15. 645
  16. 420
  17. 195
  18. 480
  19. 720
  20. 630
  21. 525
  22. 75
  23. 675
  24. 525
  25. 420
  26. 90
  27. 525
  28. 630
  29. 960
  30. 795
  31. 150
  32. 90
  33. 630
  34. 810
  35. 255
  36. 270
  37. 585
  38. 480
  39. 420
  40. 750

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