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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 894 · 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. 1.14 × 15 =
  2. 2.43 × 15 =
  3. 3.12 × 15 =
  4. 4.63 × 15 =
  5. 5.31 × 15 =
  6. 6.13 × 15 =
  7. 7.56 × 15 =
  8. 8.56 × 15 =
  9. 9.18 × 15 =
  10. 10.22 × 15 =
  11. 11.49 × 15 =
  12. 12.15 × 15 =
  13. 13.37 × 15 =
  14. 14.11 × 15 =
  15. 15.14 × 15 =
  16. 16.21 × 15 =
  17. 17.18 × 15 =
  18. 18.55 × 15 =
  19. 19.5 × 15 =
  20. 20.59 × 15 =
  21. 21.30 × 15 =
  22. 22.4 × 15 =
  23. 23.19 × 15 =
  24. 24.5 × 15 =
  25. 25.58 × 15 =
  26. 26.25 × 15 =
  27. 27.12 × 15 =
  28. 28.41 × 15 =
  29. 29.29 × 15 =
  30. 30.48 × 15 =
  31. 31.30 × 15 =
  32. 32.15 × 15 =
  33. 33.9 × 15 =
  34. 34.58 × 15 =
  35. 35.31 × 15 =
  36. 36.18 × 15 =
  37. 37.6 × 15 =
  38. 38.12 × 15 =
  39. 39.54 × 15 =
  40. 40.50 × 15 =

Answer key

  1. 210
  2. 645
  3. 180
  4. 945
  5. 465
  6. 195
  7. 840
  8. 840
  9. 270
  10. 330
  11. 735
  12. 225
  13. 555
  14. 165
  15. 210
  16. 315
  17. 270
  18. 825
  19. 75
  20. 885
  21. 450
  22. 60
  23. 285
  24. 75
  25. 870
  26. 375
  27. 180
  28. 615
  29. 435
  30. 720
  31. 450
  32. 225
  33. 135
  34. 870
  35. 465
  36. 270
  37. 90
  38. 180
  39. 810
  40. 750

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