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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 657 · 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. 1.7 × 15 =
  2. 2.12 × 15 =
  3. 3.45 × 15 =
  4. 4.28 × 15 =
  5. 5.16 × 15 =
  6. 6.19 × 15 =
  7. 7.12 × 15 =
  8. 8.55 × 15 =
  9. 9.6 × 15 =
  10. 10.61 × 15 =
  11. 11.44 × 15 =
  12. 12.63 × 15 =
  13. 13.49 × 15 =
  14. 14.40 × 15 =
  15. 15.32 × 15 =
  16. 16.22 × 15 =
  17. 17.16 × 15 =
  18. 18.62 × 15 =
  19. 19.28 × 15 =
  20. 20.4 × 15 =
  21. 21.42 × 15 =
  22. 22.55 × 15 =
  23. 23.38 × 15 =
  24. 24.58 × 15 =
  25. 25.49 × 15 =
  26. 26.18 × 15 =
  27. 27.30 × 15 =
  28. 28.64 × 15 =
  29. 29.24 × 15 =
  30. 30.44 × 15 =
  31. 31.21 × 15 =
  32. 32.39 × 15 =
  33. 33.36 × 15 =
  34. 34.41 × 15 =
  35. 35.10 × 15 =
  36. 36.14 × 15 =
  37. 37.27 × 15 =
  38. 38.4 × 15 =
  39. 39.31 × 15 =
  40. 40.18 × 15 =

Answer key

  1. 105
  2. 180
  3. 675
  4. 420
  5. 240
  6. 285
  7. 180
  8. 825
  9. 90
  10. 915
  11. 660
  12. 945
  13. 735
  14. 600
  15. 480
  16. 330
  17. 240
  18. 930
  19. 420
  20. 60
  21. 630
  22. 825
  23. 570
  24. 870
  25. 735
  26. 270
  27. 450
  28. 960
  29. 360
  30. 660
  31. 315
  32. 585
  33. 540
  34. 615
  35. 150
  36. 210
  37. 405
  38. 60
  39. 465
  40. 270

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