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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 376 · 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. 1.9 × 15 =
  2. 2.26 × 15 =
  3. 3.28 × 15 =
  4. 4.57 × 15 =
  5. 5.4 × 15 =
  6. 6.27 × 15 =
  7. 7.64 × 15 =
  8. 8.43 × 15 =
  9. 9.10 × 15 =
  10. 10.24 × 15 =
  11. 11.24 × 15 =
  12. 12.22 × 15 =
  13. 13.37 × 15 =
  14. 14.56 × 15 =
  15. 15.10 × 15 =
  16. 16.45 × 15 =
  17. 17.7 × 15 =
  18. 18.48 × 15 =
  19. 19.52 × 15 =
  20. 20.9 × 15 =
  21. 21.5 × 15 =
  22. 22.23 × 15 =
  23. 23.23 × 15 =
  24. 24.41 × 15 =
  25. 25.7 × 15 =
  26. 26.56 × 15 =
  27. 27.45 × 15 =
  28. 28.33 × 15 =
  29. 29.25 × 15 =
  30. 30.48 × 15 =
  31. 31.12 × 15 =
  32. 32.11 × 15 =
  33. 33.22 × 15 =
  34. 34.11 × 15 =
  35. 35.11 × 15 =
  36. 36.52 × 15 =
  37. 37.5 × 15 =
  38. 38.49 × 15 =
  39. 39.16 × 15 =
  40. 40.5 × 15 =

Answer key

  1. 135
  2. 390
  3. 420
  4. 855
  5. 60
  6. 405
  7. 960
  8. 645
  9. 150
  10. 360
  11. 360
  12. 330
  13. 555
  14. 840
  15. 150
  16. 675
  17. 105
  18. 720
  19. 780
  20. 135
  21. 75
  22. 345
  23. 345
  24. 615
  25. 105
  26. 840
  27. 675
  28. 495
  29. 375
  30. 720
  31. 180
  32. 165
  33. 330
  34. 165
  35. 165
  36. 780
  37. 75
  38. 735
  39. 240
  40. 75

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