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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 475 · 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. 1.58 × 15 =
  2. 2.17 × 15 =
  3. 3.10 × 15 =
  4. 4.63 × 15 =
  5. 5.49 × 15 =
  6. 6.20 × 15 =
  7. 7.41 × 15 =
  8. 8.17 × 15 =
  9. 9.26 × 15 =
  10. 10.64 × 15 =
  11. 11.22 × 15 =
  12. 12.6 × 15 =
  13. 13.11 × 15 =
  14. 14.39 × 15 =
  15. 15.17 × 15 =
  16. 16.4 × 15 =
  17. 17.36 × 15 =
  18. 18.24 × 15 =
  19. 19.20 × 15 =
  20. 20.24 × 15 =
  21. 21.21 × 15 =
  22. 22.43 × 15 =
  23. 23.36 × 15 =
  24. 24.47 × 15 =
  25. 25.43 × 15 =
  26. 26.62 × 15 =
  27. 27.4 × 15 =
  28. 28.28 × 15 =
  29. 29.64 × 15 =
  30. 30.43 × 15 =
  31. 31.56 × 15 =
  32. 32.28 × 15 =
  33. 33.7 × 15 =
  34. 34.61 × 15 =
  35. 35.39 × 15 =
  36. 36.29 × 15 =
  37. 37.61 × 15 =
  38. 38.44 × 15 =
  39. 39.20 × 15 =
  40. 40.18 × 15 =

Answer key

  1. 870
  2. 255
  3. 150
  4. 945
  5. 735
  6. 300
  7. 615
  8. 255
  9. 390
  10. 960
  11. 330
  12. 90
  13. 165
  14. 585
  15. 255
  16. 60
  17. 540
  18. 360
  19. 300
  20. 360
  21. 315
  22. 645
  23. 540
  24. 705
  25. 645
  26. 930
  27. 60
  28. 420
  29. 960
  30. 645
  31. 840
  32. 420
  33. 105
  34. 915
  35. 585
  36. 435
  37. 915
  38. 660
  39. 300
  40. 270

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