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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 205 · 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. 1.5 × 15 =
  2. 2.15 × 15 =
  3. 3.7 × 15 =
  4. 4.19 × 15 =
  5. 5.47 × 15 =
  6. 6.48 × 15 =
  7. 7.21 × 15 =
  8. 8.25 × 15 =
  9. 9.63 × 15 =
  10. 10.26 × 15 =
  11. 11.44 × 15 =
  12. 12.32 × 15 =
  13. 13.40 × 15 =
  14. 14.4 × 15 =
  15. 15.18 × 15 =
  16. 16.16 × 15 =
  17. 17.59 × 15 =
  18. 18.48 × 15 =
  19. 19.10 × 15 =
  20. 20.16 × 15 =
  21. 21.4 × 15 =
  22. 22.11 × 15 =
  23. 23.55 × 15 =
  24. 24.15 × 15 =
  25. 25.34 × 15 =
  26. 26.31 × 15 =
  27. 27.26 × 15 =
  28. 28.52 × 15 =
  29. 29.36 × 15 =
  30. 30.55 × 15 =
  31. 31.47 × 15 =
  32. 32.30 × 15 =
  33. 33.4 × 15 =
  34. 34.4 × 15 =
  35. 35.45 × 15 =
  36. 36.47 × 15 =
  37. 37.28 × 15 =
  38. 38.34 × 15 =
  39. 39.14 × 15 =
  40. 40.31 × 15 =

Answer key

  1. 75
  2. 225
  3. 105
  4. 285
  5. 705
  6. 720
  7. 315
  8. 375
  9. 945
  10. 390
  11. 660
  12. 480
  13. 600
  14. 60
  15. 270
  16. 240
  17. 885
  18. 720
  19. 150
  20. 240
  21. 60
  22. 165
  23. 825
  24. 225
  25. 510
  26. 465
  27. 390
  28. 780
  29. 540
  30. 825
  31. 705
  32. 450
  33. 60
  34. 60
  35. 675
  36. 705
  37. 420
  38. 510
  39. 210
  40. 465

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