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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 356 · 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. 1.48 × 15 =
  2. 2.59 × 15 =
  3. 3.49 × 15 =
  4. 4.34 × 15 =
  5. 5.31 × 15 =
  6. 6.6 × 15 =
  7. 7.37 × 15 =
  8. 8.10 × 15 =
  9. 9.5 × 15 =
  10. 10.48 × 15 =
  11. 11.23 × 15 =
  12. 12.16 × 15 =
  13. 13.16 × 15 =
  14. 14.4 × 15 =
  15. 15.5 × 15 =
  16. 16.53 × 15 =
  17. 17.12 × 15 =
  18. 18.25 × 15 =
  19. 19.49 × 15 =
  20. 20.12 × 15 =
  21. 21.27 × 15 =
  22. 22.8 × 15 =
  23. 23.28 × 15 =
  24. 24.36 × 15 =
  25. 25.47 × 15 =
  26. 26.4 × 15 =
  27. 27.52 × 15 =
  28. 28.7 × 15 =
  29. 29.12 × 15 =
  30. 30.45 × 15 =
  31. 31.36 × 15 =
  32. 32.55 × 15 =
  33. 33.14 × 15 =
  34. 34.48 × 15 =
  35. 35.13 × 15 =
  36. 36.64 × 15 =
  37. 37.54 × 15 =
  38. 38.21 × 15 =
  39. 39.39 × 15 =
  40. 40.61 × 15 =

Answer key

  1. 720
  2. 885
  3. 735
  4. 510
  5. 465
  6. 90
  7. 555
  8. 150
  9. 75
  10. 720
  11. 345
  12. 240
  13. 240
  14. 60
  15. 75
  16. 795
  17. 180
  18. 375
  19. 735
  20. 180
  21. 405
  22. 120
  23. 420
  24. 540
  25. 705
  26. 60
  27. 780
  28. 105
  29. 180
  30. 675
  31. 540
  32. 825
  33. 210
  34. 720
  35. 195
  36. 960
  37. 810
  38. 315
  39. 585
  40. 915

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