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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 158 · 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. 1.52 × 15 =
  2. 2.55 × 15 =
  3. 3.58 × 15 =
  4. 4.26 × 15 =
  5. 5.11 × 15 =
  6. 6.29 × 15 =
  7. 7.55 × 15 =
  8. 8.51 × 15 =
  9. 9.33 × 15 =
  10. 10.33 × 15 =
  11. 11.40 × 15 =
  12. 12.36 × 15 =
  13. 13.63 × 15 =
  14. 14.14 × 15 =
  15. 15.4 × 15 =
  16. 16.26 × 15 =
  17. 17.17 × 15 =
  18. 18.42 × 15 =
  19. 19.61 × 15 =
  20. 20.8 × 15 =
  21. 21.39 × 15 =
  22. 22.53 × 15 =
  23. 23.25 × 15 =
  24. 24.54 × 15 =
  25. 25.19 × 15 =
  26. 26.47 × 15 =
  27. 27.63 × 15 =
  28. 28.43 × 15 =
  29. 29.48 × 15 =
  30. 30.5 × 15 =
  31. 31.61 × 15 =
  32. 32.5 × 15 =
  33. 33.39 × 15 =
  34. 34.15 × 15 =
  35. 35.37 × 15 =
  36. 36.47 × 15 =
  37. 37.16 × 15 =
  38. 38.23 × 15 =
  39. 39.40 × 15 =
  40. 40.59 × 15 =

Answer key

  1. 780
  2. 825
  3. 870
  4. 390
  5. 165
  6. 435
  7. 825
  8. 765
  9. 495
  10. 495
  11. 600
  12. 540
  13. 945
  14. 210
  15. 60
  16. 390
  17. 255
  18. 630
  19. 915
  20. 120
  21. 585
  22. 795
  23. 375
  24. 810
  25. 285
  26. 705
  27. 945
  28. 645
  29. 720
  30. 75
  31. 915
  32. 75
  33. 585
  34. 225
  35. 555
  36. 705
  37. 240
  38. 345
  39. 600
  40. 885

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