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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 318 · 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. 1.53 × 15 =
  2. 2.6 × 15 =
  3. 3.22 × 15 =
  4. 4.25 × 15 =
  5. 5.14 × 15 =
  6. 6.19 × 15 =
  7. 7.26 × 15 =
  8. 8.64 × 15 =
  9. 9.8 × 15 =
  10. 10.44 × 15 =
  11. 11.10 × 15 =
  12. 12.36 × 15 =
  13. 13.51 × 15 =
  14. 14.51 × 15 =
  15. 15.15 × 15 =
  16. 16.19 × 15 =
  17. 17.61 × 15 =
  18. 18.43 × 15 =
  19. 19.14 × 15 =
  20. 20.4 × 15 =
  21. 21.60 × 15 =
  22. 22.21 × 15 =
  23. 23.4 × 15 =
  24. 24.44 × 15 =
  25. 25.62 × 15 =
  26. 26.10 × 15 =
  27. 27.63 × 15 =
  28. 28.10 × 15 =
  29. 29.25 × 15 =
  30. 30.40 × 15 =
  31. 31.32 × 15 =
  32. 32.16 × 15 =
  33. 33.16 × 15 =
  34. 34.47 × 15 =
  35. 35.12 × 15 =
  36. 36.64 × 15 =
  37. 37.15 × 15 =
  38. 38.21 × 15 =
  39. 39.25 × 15 =
  40. 40.34 × 15 =

Answer key

  1. 795
  2. 90
  3. 330
  4. 375
  5. 210
  6. 285
  7. 390
  8. 960
  9. 120
  10. 660
  11. 150
  12. 540
  13. 765
  14. 765
  15. 225
  16. 285
  17. 915
  18. 645
  19. 210
  20. 60
  21. 900
  22. 315
  23. 60
  24. 660
  25. 930
  26. 150
  27. 945
  28. 150
  29. 375
  30. 600
  31. 480
  32. 240
  33. 240
  34. 705
  35. 180
  36. 960
  37. 225
  38. 315
  39. 375
  40. 510

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