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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 277 · 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. 1.49 × 15 =
  2. 2.41 × 15 =
  3. 3.53 × 15 =
  4. 4.14 × 15 =
  5. 5.5 × 15 =
  6. 6.48 × 15 =
  7. 7.14 × 15 =
  8. 8.60 × 15 =
  9. 9.33 × 15 =
  10. 10.34 × 15 =
  11. 11.25 × 15 =
  12. 12.52 × 15 =
  13. 13.44 × 15 =
  14. 14.32 × 15 =
  15. 15.4 × 15 =
  16. 16.41 × 15 =
  17. 17.10 × 15 =
  18. 18.7 × 15 =
  19. 19.39 × 15 =
  20. 20.20 × 15 =
  21. 21.51 × 15 =
  22. 22.9 × 15 =
  23. 23.43 × 15 =
  24. 24.19 × 15 =
  25. 25.23 × 15 =
  26. 26.32 × 15 =
  27. 27.55 × 15 =
  28. 28.15 × 15 =
  29. 29.43 × 15 =
  30. 30.42 × 15 =
  31. 31.52 × 15 =
  32. 32.7 × 15 =
  33. 33.7 × 15 =
  34. 34.49 × 15 =
  35. 35.11 × 15 =
  36. 36.27 × 15 =
  37. 37.9 × 15 =
  38. 38.4 × 15 =
  39. 39.20 × 15 =
  40. 40.18 × 15 =

Answer key

  1. 735
  2. 615
  3. 795
  4. 210
  5. 75
  6. 720
  7. 210
  8. 900
  9. 495
  10. 510
  11. 375
  12. 780
  13. 660
  14. 480
  15. 60
  16. 615
  17. 150
  18. 105
  19. 585
  20. 300
  21. 765
  22. 135
  23. 645
  24. 285
  25. 345
  26. 480
  27. 825
  28. 225
  29. 645
  30. 630
  31. 780
  32. 105
  33. 105
  34. 735
  35. 165
  36. 405
  37. 135
  38. 60
  39. 300
  40. 270

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