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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 549 · 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. 1.13 × 15 =
  2. 2.21 × 15 =
  3. 3.51 × 15 =
  4. 4.57 × 15 =
  5. 5.41 × 15 =
  6. 6.42 × 15 =
  7. 7.11 × 15 =
  8. 8.34 × 15 =
  9. 9.18 × 15 =
  10. 10.5 × 15 =
  11. 11.36 × 15 =
  12. 12.29 × 15 =
  13. 13.22 × 15 =
  14. 14.57 × 15 =
  15. 15.61 × 15 =
  16. 16.40 × 15 =
  17. 17.35 × 15 =
  18. 18.28 × 15 =
  19. 19.24 × 15 =
  20. 20.18 × 15 =
  21. 21.5 × 15 =
  22. 22.28 × 15 =
  23. 23.52 × 15 =
  24. 24.62 × 15 =
  25. 25.58 × 15 =
  26. 26.58 × 15 =
  27. 27.59 × 15 =
  28. 28.11 × 15 =
  29. 29.57 × 15 =
  30. 30.30 × 15 =
  31. 31.54 × 15 =
  32. 32.23 × 15 =
  33. 33.7 × 15 =
  34. 34.6 × 15 =
  35. 35.4 × 15 =
  36. 36.24 × 15 =
  37. 37.18 × 15 =
  38. 38.16 × 15 =
  39. 39.57 × 15 =
  40. 40.62 × 15 =

Answer key

  1. 195
  2. 315
  3. 765
  4. 855
  5. 615
  6. 630
  7. 165
  8. 510
  9. 270
  10. 75
  11. 540
  12. 435
  13. 330
  14. 855
  15. 915
  16. 600
  17. 525
  18. 420
  19. 360
  20. 270
  21. 75
  22. 420
  23. 780
  24. 930
  25. 870
  26. 870
  27. 885
  28. 165
  29. 855
  30. 450
  31. 810
  32. 345
  33. 105
  34. 90
  35. 60
  36. 360
  37. 270
  38. 240
  39. 855
  40. 930

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