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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 778 · 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. 1.34 × 15 =
  2. 2.48 × 15 =
  3. 3.27 × 15 =
  4. 4.53 × 15 =
  5. 5.25 × 15 =
  6. 6.63 × 15 =
  7. 7.37 × 15 =
  8. 8.40 × 15 =
  9. 9.36 × 15 =
  10. 10.55 × 15 =
  11. 11.19 × 15 =
  12. 12.14 × 15 =
  13. 13.18 × 15 =
  14. 14.7 × 15 =
  15. 15.59 × 15 =
  16. 16.6 × 15 =
  17. 17.46 × 15 =
  18. 18.36 × 15 =
  19. 19.49 × 15 =
  20. 20.11 × 15 =
  21. 21.11 × 15 =
  22. 22.4 × 15 =
  23. 23.36 × 15 =
  24. 24.41 × 15 =
  25. 25.53 × 15 =
  26. 26.24 × 15 =
  27. 27.15 × 15 =
  28. 28.41 × 15 =
  29. 29.38 × 15 =
  30. 30.58 × 15 =
  31. 31.33 × 15 =
  32. 32.50 × 15 =
  33. 33.26 × 15 =
  34. 34.49 × 15 =
  35. 35.26 × 15 =
  36. 36.46 × 15 =
  37. 37.40 × 15 =
  38. 38.25 × 15 =
  39. 39.59 × 15 =
  40. 40.24 × 15 =

Answer key

  1. 510
  2. 720
  3. 405
  4. 795
  5. 375
  6. 945
  7. 555
  8. 600
  9. 540
  10. 825
  11. 285
  12. 210
  13. 270
  14. 105
  15. 885
  16. 90
  17. 690
  18. 540
  19. 735
  20. 165
  21. 165
  22. 60
  23. 540
  24. 615
  25. 795
  26. 360
  27. 225
  28. 615
  29. 570
  30. 870
  31. 495
  32. 750
  33. 390
  34. 735
  35. 390
  36. 690
  37. 600
  38. 375
  39. 885
  40. 360

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