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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 95 · 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. 1.31 × 15 =
  2. 2.28 × 15 =
  3. 3.30 × 15 =
  4. 4.12 × 15 =
  5. 5.24 × 15 =
  6. 6.38 × 15 =
  7. 7.8 × 15 =
  8. 8.26 × 15 =
  9. 9.59 × 15 =
  10. 10.4 × 15 =
  11. 11.61 × 15 =
  12. 12.62 × 15 =
  13. 13.59 × 15 =
  14. 14.59 × 15 =
  15. 15.45 × 15 =
  16. 16.7 × 15 =
  17. 17.36 × 15 =
  18. 18.47 × 15 =
  19. 19.55 × 15 =
  20. 20.53 × 15 =
  21. 21.21 × 15 =
  22. 22.22 × 15 =
  23. 23.4 × 15 =
  24. 24.7 × 15 =
  25. 25.58 × 15 =
  26. 26.51 × 15 =
  27. 27.63 × 15 =
  28. 28.59 × 15 =
  29. 29.41 × 15 =
  30. 30.16 × 15 =
  31. 31.36 × 15 =
  32. 32.28 × 15 =
  33. 33.12 × 15 =
  34. 34.41 × 15 =
  35. 35.55 × 15 =
  36. 36.30 × 15 =
  37. 37.31 × 15 =
  38. 38.16 × 15 =
  39. 39.60 × 15 =
  40. 40.35 × 15 =

Answer key

  1. 465
  2. 420
  3. 450
  4. 180
  5. 360
  6. 570
  7. 120
  8. 390
  9. 885
  10. 60
  11. 915
  12. 930
  13. 885
  14. 885
  15. 675
  16. 105
  17. 540
  18. 705
  19. 825
  20. 795
  21. 315
  22. 330
  23. 60
  24. 105
  25. 870
  26. 765
  27. 945
  28. 885
  29. 615
  30. 240
  31. 540
  32. 420
  33. 180
  34. 615
  35. 825
  36. 450
  37. 465
  38. 240
  39. 900
  40. 525

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