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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 450 · 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. 1.33 × 15 =
  2. 2.64 × 15 =
  3. 3.54 × 15 =
  4. 4.56 × 15 =
  5. 5.59 × 15 =
  6. 6.13 × 15 =
  7. 7.52 × 15 =
  8. 8.62 × 15 =
  9. 9.25 × 15 =
  10. 10.22 × 15 =
  11. 11.9 × 15 =
  12. 12.16 × 15 =
  13. 13.26 × 15 =
  14. 14.25 × 15 =
  15. 15.7 × 15 =
  16. 16.41 × 15 =
  17. 17.30 × 15 =
  18. 18.23 × 15 =
  19. 19.63 × 15 =
  20. 20.18 × 15 =
  21. 21.16 × 15 =
  22. 22.42 × 15 =
  23. 23.27 × 15 =
  24. 24.45 × 15 =
  25. 25.4 × 15 =
  26. 26.39 × 15 =
  27. 27.53 × 15 =
  28. 28.6 × 15 =
  29. 29.52 × 15 =
  30. 30.45 × 15 =
  31. 31.14 × 15 =
  32. 32.28 × 15 =
  33. 33.18 × 15 =
  34. 34.5 × 15 =
  35. 35.40 × 15 =
  36. 36.16 × 15 =
  37. 37.12 × 15 =
  38. 38.63 × 15 =
  39. 39.46 × 15 =
  40. 40.13 × 15 =

Answer key

  1. 495
  2. 960
  3. 810
  4. 840
  5. 885
  6. 195
  7. 780
  8. 930
  9. 375
  10. 330
  11. 135
  12. 240
  13. 390
  14. 375
  15. 105
  16. 615
  17. 450
  18. 345
  19. 945
  20. 270
  21. 240
  22. 630
  23. 405
  24. 675
  25. 60
  26. 585
  27. 795
  28. 90
  29. 780
  30. 675
  31. 210
  32. 420
  33. 270
  34. 75
  35. 600
  36. 240
  37. 180
  38. 945
  39. 690
  40. 195

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