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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 208 · 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. 1.14 × 15 =
  2. 2.19 × 15 =
  3. 3.15 × 15 =
  4. 4.7 × 15 =
  5. 5.54 × 15 =
  6. 6.24 × 15 =
  7. 7.62 × 15 =
  8. 8.21 × 15 =
  9. 9.62 × 15 =
  10. 10.48 × 15 =
  11. 11.47 × 15 =
  12. 12.4 × 15 =
  13. 13.49 × 15 =
  14. 14.36 × 15 =
  15. 15.30 × 15 =
  16. 16.23 × 15 =
  17. 17.25 × 15 =
  18. 18.50 × 15 =
  19. 19.17 × 15 =
  20. 20.27 × 15 =
  21. 21.17 × 15 =
  22. 22.17 × 15 =
  23. 23.49 × 15 =
  24. 24.17 × 15 =
  25. 25.10 × 15 =
  26. 26.47 × 15 =
  27. 27.15 × 15 =
  28. 28.14 × 15 =
  29. 29.25 × 15 =
  30. 30.53 × 15 =
  31. 31.18 × 15 =
  32. 32.62 × 15 =
  33. 33.16 × 15 =
  34. 34.45 × 15 =
  35. 35.38 × 15 =
  36. 36.61 × 15 =
  37. 37.7 × 15 =
  38. 38.43 × 15 =
  39. 39.5 × 15 =
  40. 40.47 × 15 =

Answer key

  1. 210
  2. 285
  3. 225
  4. 105
  5. 810
  6. 360
  7. 930
  8. 315
  9. 930
  10. 720
  11. 705
  12. 60
  13. 735
  14. 540
  15. 450
  16. 345
  17. 375
  18. 750
  19. 255
  20. 405
  21. 255
  22. 255
  23. 735
  24. 255
  25. 150
  26. 705
  27. 225
  28. 210
  29. 375
  30. 795
  31. 270
  32. 930
  33. 240
  34. 675
  35. 570
  36. 915
  37. 105
  38. 645
  39. 75
  40. 705

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