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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 49 · 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. 1.10 × 15 =
  2. 2.18 × 15 =
  3. 3.46 × 15 =
  4. 4.7 × 15 =
  5. 5.43 × 15 =
  6. 6.54 × 15 =
  7. 7.47 × 15 =
  8. 8.7 × 15 =
  9. 9.41 × 15 =
  10. 10.15 × 15 =
  11. 11.62 × 15 =
  12. 12.38 × 15 =
  13. 13.31 × 15 =
  14. 14.11 × 15 =
  15. 15.57 × 15 =
  16. 16.64 × 15 =
  17. 17.22 × 15 =
  18. 18.24 × 15 =
  19. 19.22 × 15 =
  20. 20.39 × 15 =
  21. 21.16 × 15 =
  22. 22.19 × 15 =
  23. 23.44 × 15 =
  24. 24.6 × 15 =
  25. 25.9 × 15 =
  26. 26.44 × 15 =
  27. 27.15 × 15 =
  28. 28.48 × 15 =
  29. 29.6 × 15 =
  30. 30.20 × 15 =
  31. 31.19 × 15 =
  32. 32.49 × 15 =
  33. 33.30 × 15 =
  34. 34.10 × 15 =
  35. 35.41 × 15 =
  36. 36.41 × 15 =
  37. 37.24 × 15 =
  38. 38.36 × 15 =
  39. 39.40 × 15 =
  40. 40.44 × 15 =

Answer key

  1. 150
  2. 270
  3. 690
  4. 105
  5. 645
  6. 810
  7. 705
  8. 105
  9. 615
  10. 225
  11. 930
  12. 570
  13. 465
  14. 165
  15. 855
  16. 960
  17. 330
  18. 360
  19. 330
  20. 585
  21. 240
  22. 285
  23. 660
  24. 90
  25. 135
  26. 660
  27. 225
  28. 720
  29. 90
  30. 300
  31. 285
  32. 735
  33. 450
  34. 150
  35. 615
  36. 615
  37. 360
  38. 540
  39. 600
  40. 660

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