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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 896 · 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. 1.20 × 15 =
  2. 2.8 × 15 =
  3. 3.36 × 15 =
  4. 4.55 × 15 =
  5. 5.26 × 15 =
  6. 6.40 × 15 =
  7. 7.4 × 15 =
  8. 8.26 × 15 =
  9. 9.7 × 15 =
  10. 10.40 × 15 =
  11. 11.40 × 15 =
  12. 12.36 × 15 =
  13. 13.7 × 15 =
  14. 14.24 × 15 =
  15. 15.21 × 15 =
  16. 16.22 × 15 =
  17. 17.39 × 15 =
  18. 18.62 × 15 =
  19. 19.20 × 15 =
  20. 20.23 × 15 =
  21. 21.34 × 15 =
  22. 22.50 × 15 =
  23. 23.59 × 15 =
  24. 24.11 × 15 =
  25. 25.13 × 15 =
  26. 26.55 × 15 =
  27. 27.19 × 15 =
  28. 28.19 × 15 =
  29. 29.36 × 15 =
  30. 30.43 × 15 =
  31. 31.42 × 15 =
  32. 32.60 × 15 =
  33. 33.31 × 15 =
  34. 34.58 × 15 =
  35. 35.7 × 15 =
  36. 36.55 × 15 =
  37. 37.22 × 15 =
  38. 38.47 × 15 =
  39. 39.40 × 15 =
  40. 40.15 × 15 =

Answer key

  1. 300
  2. 120
  3. 540
  4. 825
  5. 390
  6. 600
  7. 60
  8. 390
  9. 105
  10. 600
  11. 600
  12. 540
  13. 105
  14. 360
  15. 315
  16. 330
  17. 585
  18. 930
  19. 300
  20. 345
  21. 510
  22. 750
  23. 885
  24. 165
  25. 195
  26. 825
  27. 285
  28. 285
  29. 540
  30. 645
  31. 630
  32. 900
  33. 465
  34. 870
  35. 105
  36. 825
  37. 330
  38. 705
  39. 600
  40. 225

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