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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 299 · 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. 1.27 × 15 =
  2. 2.37 × 15 =
  3. 3.23 × 15 =
  4. 4.25 × 15 =
  5. 5.27 × 15 =
  6. 6.8 × 15 =
  7. 7.27 × 15 =
  8. 8.47 × 15 =
  9. 9.46 × 15 =
  10. 10.36 × 15 =
  11. 11.48 × 15 =
  12. 12.49 × 15 =
  13. 13.48 × 15 =
  14. 14.11 × 15 =
  15. 15.19 × 15 =
  16. 16.34 × 15 =
  17. 17.37 × 15 =
  18. 18.32 × 15 =
  19. 19.4 × 15 =
  20. 20.21 × 15 =
  21. 21.19 × 15 =
  22. 22.62 × 15 =
  23. 23.8 × 15 =
  24. 24.38 × 15 =
  25. 25.26 × 15 =
  26. 26.6 × 15 =
  27. 27.24 × 15 =
  28. 28.46 × 15 =
  29. 29.24 × 15 =
  30. 30.48 × 15 =
  31. 31.4 × 15 =
  32. 32.5 × 15 =
  33. 33.27 × 15 =
  34. 34.51 × 15 =
  35. 35.59 × 15 =
  36. 36.22 × 15 =
  37. 37.16 × 15 =
  38. 38.15 × 15 =
  39. 39.21 × 15 =
  40. 40.48 × 15 =

Answer key

  1. 405
  2. 555
  3. 345
  4. 375
  5. 405
  6. 120
  7. 405
  8. 705
  9. 690
  10. 540
  11. 720
  12. 735
  13. 720
  14. 165
  15. 285
  16. 510
  17. 555
  18. 480
  19. 60
  20. 315
  21. 285
  22. 930
  23. 120
  24. 570
  25. 390
  26. 90
  27. 360
  28. 690
  29. 360
  30. 720
  31. 60
  32. 75
  33. 405
  34. 765
  35. 885
  36. 330
  37. 240
  38. 225
  39. 315
  40. 720

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