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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 375 · 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. 1.19 × 15 =
  2. 2.51 × 15 =
  3. 3.22 × 15 =
  4. 4.27 × 15 =
  5. 5.22 × 15 =
  6. 6.26 × 15 =
  7. 7.61 × 15 =
  8. 8.31 × 15 =
  9. 9.18 × 15 =
  10. 10.57 × 15 =
  11. 11.46 × 15 =
  12. 12.26 × 15 =
  13. 13.35 × 15 =
  14. 14.55 × 15 =
  15. 15.29 × 15 =
  16. 16.18 × 15 =
  17. 17.12 × 15 =
  18. 18.6 × 15 =
  19. 19.50 × 15 =
  20. 20.47 × 15 =
  21. 21.15 × 15 =
  22. 22.47 × 15 =
  23. 23.61 × 15 =
  24. 24.42 × 15 =
  25. 25.8 × 15 =
  26. 26.44 × 15 =
  27. 27.9 × 15 =
  28. 28.5 × 15 =
  29. 29.27 × 15 =
  30. 30.51 × 15 =
  31. 31.14 × 15 =
  32. 32.63 × 15 =
  33. 33.33 × 15 =
  34. 34.33 × 15 =
  35. 35.30 × 15 =
  36. 36.19 × 15 =
  37. 37.58 × 15 =
  38. 38.37 × 15 =
  39. 39.28 × 15 =
  40. 40.62 × 15 =

Answer key

  1. 285
  2. 765
  3. 330
  4. 405
  5. 330
  6. 390
  7. 915
  8. 465
  9. 270
  10. 855
  11. 690
  12. 390
  13. 525
  14. 825
  15. 435
  16. 270
  17. 180
  18. 90
  19. 750
  20. 705
  21. 225
  22. 705
  23. 915
  24. 630
  25. 120
  26. 660
  27. 135
  28. 75
  29. 405
  30. 765
  31. 210
  32. 945
  33. 495
  34. 495
  35. 450
  36. 285
  37. 870
  38. 555
  39. 420
  40. 930

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