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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 301 · 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. 2.59 × 15 =
  3. 3.42 × 15 =
  4. 4.52 × 15 =
  5. 5.63 × 15 =
  6. 6.36 × 15 =
  7. 7.14 × 15 =
  8. 8.43 × 15 =
  9. 9.64 × 15 =
  10. 10.35 × 15 =
  11. 11.62 × 15 =
  12. 12.28 × 15 =
  13. 13.33 × 15 =
  14. 14.11 × 15 =
  15. 15.21 × 15 =
  16. 16.20 × 15 =
  17. 17.52 × 15 =
  18. 18.23 × 15 =
  19. 19.19 × 15 =
  20. 20.55 × 15 =
  21. 21.51 × 15 =
  22. 22.19 × 15 =
  23. 23.58 × 15 =
  24. 24.8 × 15 =
  25. 25.18 × 15 =
  26. 26.21 × 15 =
  27. 27.63 × 15 =
  28. 28.14 × 15 =
  29. 29.12 × 15 =
  30. 30.29 × 15 =
  31. 31.8 × 15 =
  32. 32.29 × 15 =
  33. 33.18 × 15 =
  34. 34.38 × 15 =
  35. 35.16 × 15 =
  36. 36.9 × 15 =
  37. 37.39 × 15 =
  38. 38.23 × 15 =
  39. 39.32 × 15 =
  40. 40.52 × 15 =

Answer key

  1. 780
  2. 885
  3. 630
  4. 780
  5. 945
  6. 540
  7. 210
  8. 645
  9. 960
  10. 525
  11. 930
  12. 420
  13. 495
  14. 165
  15. 315
  16. 300
  17. 780
  18. 345
  19. 285
  20. 825
  21. 765
  22. 285
  23. 870
  24. 120
  25. 270
  26. 315
  27. 945
  28. 210
  29. 180
  30. 435
  31. 120
  32. 435
  33. 270
  34. 570
  35. 240
  36. 135
  37. 585
  38. 345
  39. 480
  40. 780

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