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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 537 · 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. 1.57 × 15 =
  2. 2.34 × 15 =
  3. 3.14 × 15 =
  4. 4.12 × 15 =
  5. 5.25 × 15 =
  6. 6.45 × 15 =
  7. 7.42 × 15 =
  8. 8.47 × 15 =
  9. 9.62 × 15 =
  10. 10.14 × 15 =
  11. 11.44 × 15 =
  12. 12.17 × 15 =
  13. 13.26 × 15 =
  14. 14.28 × 15 =
  15. 15.15 × 15 =
  16. 16.22 × 15 =
  17. 17.32 × 15 =
  18. 18.25 × 15 =
  19. 19.23 × 15 =
  20. 20.4 × 15 =
  21. 21.5 × 15 =
  22. 22.38 × 15 =
  23. 23.21 × 15 =
  24. 24.34 × 15 =
  25. 25.16 × 15 =
  26. 26.44 × 15 =
  27. 27.8 × 15 =
  28. 28.17 × 15 =
  29. 29.6 × 15 =
  30. 30.49 × 15 =
  31. 31.29 × 15 =
  32. 32.48 × 15 =
  33. 33.21 × 15 =
  34. 34.20 × 15 =
  35. 35.10 × 15 =
  36. 36.4 × 15 =
  37. 37.22 × 15 =
  38. 38.61 × 15 =
  39. 39.45 × 15 =
  40. 40.42 × 15 =

Answer key

  1. 855
  2. 510
  3. 210
  4. 180
  5. 375
  6. 675
  7. 630
  8. 705
  9. 930
  10. 210
  11. 660
  12. 255
  13. 390
  14. 420
  15. 225
  16. 330
  17. 480
  18. 375
  19. 345
  20. 60
  21. 75
  22. 570
  23. 315
  24. 510
  25. 240
  26. 660
  27. 120
  28. 255
  29. 90
  30. 735
  31. 435
  32. 720
  33. 315
  34. 300
  35. 150
  36. 60
  37. 330
  38. 915
  39. 675
  40. 630

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