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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 227 · 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. 1.25 × 15 =
  2. 2.58 × 15 =
  3. 3.32 × 15 =
  4. 4.40 × 15 =
  5. 5.42 × 15 =
  6. 6.10 × 15 =
  7. 7.38 × 15 =
  8. 8.55 × 15 =
  9. 9.12 × 15 =
  10. 10.47 × 15 =
  11. 11.58 × 15 =
  12. 12.9 × 15 =
  13. 13.19 × 15 =
  14. 14.18 × 15 =
  15. 15.5 × 15 =
  16. 16.6 × 15 =
  17. 17.27 × 15 =
  18. 18.4 × 15 =
  19. 19.26 × 15 =
  20. 20.53 × 15 =
  21. 21.4 × 15 =
  22. 22.20 × 15 =
  23. 23.11 × 15 =
  24. 24.27 × 15 =
  25. 25.26 × 15 =
  26. 26.23 × 15 =
  27. 27.50 × 15 =
  28. 28.53 × 15 =
  29. 29.8 × 15 =
  30. 30.35 × 15 =
  31. 31.9 × 15 =
  32. 32.6 × 15 =
  33. 33.24 × 15 =
  34. 34.27 × 15 =
  35. 35.35 × 15 =
  36. 36.47 × 15 =
  37. 37.40 × 15 =
  38. 38.17 × 15 =
  39. 39.51 × 15 =
  40. 40.13 × 15 =

Answer key

  1. 375
  2. 870
  3. 480
  4. 600
  5. 630
  6. 150
  7. 570
  8. 825
  9. 180
  10. 705
  11. 870
  12. 135
  13. 285
  14. 270
  15. 75
  16. 90
  17. 405
  18. 60
  19. 390
  20. 795
  21. 60
  22. 300
  23. 165
  24. 405
  25. 390
  26. 345
  27. 750
  28. 795
  29. 120
  30. 525
  31. 135
  32. 90
  33. 360
  34. 405
  35. 525
  36. 705
  37. 600
  38. 255
  39. 765
  40. 195

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