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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 405 · 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. 1.60 × 15 =
  2. 2.52 × 15 =
  3. 3.26 × 15 =
  4. 4.41 × 15 =
  5. 5.20 × 15 =
  6. 6.5 × 15 =
  7. 7.35 × 15 =
  8. 8.14 × 15 =
  9. 9.8 × 15 =
  10. 10.54 × 15 =
  11. 11.13 × 15 =
  12. 12.15 × 15 =
  13. 13.44 × 15 =
  14. 14.61 × 15 =
  15. 15.13 × 15 =
  16. 16.19 × 15 =
  17. 17.64 × 15 =
  18. 18.28 × 15 =
  19. 19.58 × 15 =
  20. 20.34 × 15 =
  21. 21.17 × 15 =
  22. 22.19 × 15 =
  23. 23.4 × 15 =
  24. 24.14 × 15 =
  25. 25.64 × 15 =
  26. 26.52 × 15 =
  27. 27.58 × 15 =
  28. 28.23 × 15 =
  29. 29.41 × 15 =
  30. 30.18 × 15 =
  31. 31.40 × 15 =
  32. 32.33 × 15 =
  33. 33.40 × 15 =
  34. 34.60 × 15 =
  35. 35.8 × 15 =
  36. 36.20 × 15 =
  37. 37.36 × 15 =
  38. 38.52 × 15 =
  39. 39.64 × 15 =
  40. 40.7 × 15 =

Answer key

  1. 900
  2. 780
  3. 390
  4. 615
  5. 300
  6. 75
  7. 525
  8. 210
  9. 120
  10. 810
  11. 195
  12. 225
  13. 660
  14. 915
  15. 195
  16. 285
  17. 960
  18. 420
  19. 870
  20. 510
  21. 255
  22. 285
  23. 60
  24. 210
  25. 960
  26. 780
  27. 870
  28. 345
  29. 615
  30. 270
  31. 600
  32. 495
  33. 600
  34. 900
  35. 120
  36. 300
  37. 540
  38. 780
  39. 960
  40. 105

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