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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 758 · 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. 1.59 × 15 =
  2. 2.32 × 15 =
  3. 3.57 × 15 =
  4. 4.62 × 15 =
  5. 5.45 × 15 =
  6. 6.6 × 15 =
  7. 7.32 × 15 =
  8. 8.7 × 15 =
  9. 9.21 × 15 =
  10. 10.56 × 15 =
  11. 11.53 × 15 =
  12. 12.53 × 15 =
  13. 13.24 × 15 =
  14. 14.49 × 15 =
  15. 15.12 × 15 =
  16. 16.32 × 15 =
  17. 17.18 × 15 =
  18. 18.27 × 15 =
  19. 19.36 × 15 =
  20. 20.45 × 15 =
  21. 21.50 × 15 =
  22. 22.16 × 15 =
  23. 23.41 × 15 =
  24. 24.14 × 15 =
  25. 25.4 × 15 =
  26. 26.27 × 15 =
  27. 27.44 × 15 =
  28. 28.30 × 15 =
  29. 29.14 × 15 =
  30. 30.63 × 15 =
  31. 31.8 × 15 =
  32. 32.13 × 15 =
  33. 33.64 × 15 =
  34. 34.10 × 15 =
  35. 35.10 × 15 =
  36. 36.18 × 15 =
  37. 37.58 × 15 =
  38. 38.19 × 15 =
  39. 39.12 × 15 =
  40. 40.24 × 15 =

Answer key

  1. 885
  2. 480
  3. 855
  4. 930
  5. 675
  6. 90
  7. 480
  8. 105
  9. 315
  10. 840
  11. 795
  12. 795
  13. 360
  14. 735
  15. 180
  16. 480
  17. 270
  18. 405
  19. 540
  20. 675
  21. 750
  22. 240
  23. 615
  24. 210
  25. 60
  26. 405
  27. 660
  28. 450
  29. 210
  30. 945
  31. 120
  32. 195
  33. 960
  34. 150
  35. 150
  36. 270
  37. 870
  38. 285
  39. 180
  40. 360

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