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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 365 · 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. 1.15 × 15 =
  2. 2.58 × 15 =
  3. 3.8 × 15 =
  4. 4.32 × 15 =
  5. 5.23 × 15 =
  6. 6.29 × 15 =
  7. 7.61 × 15 =
  8. 8.41 × 15 =
  9. 9.10 × 15 =
  10. 10.22 × 15 =
  11. 11.43 × 15 =
  12. 12.23 × 15 =
  13. 13.27 × 15 =
  14. 14.8 × 15 =
  15. 15.16 × 15 =
  16. 16.28 × 15 =
  17. 17.11 × 15 =
  18. 18.46 × 15 =
  19. 19.17 × 15 =
  20. 20.16 × 15 =
  21. 21.4 × 15 =
  22. 22.20 × 15 =
  23. 23.47 × 15 =
  24. 24.38 × 15 =
  25. 25.64 × 15 =
  26. 26.55 × 15 =
  27. 27.59 × 15 =
  28. 28.48 × 15 =
  29. 29.34 × 15 =
  30. 30.38 × 15 =
  31. 31.40 × 15 =
  32. 32.22 × 15 =
  33. 33.14 × 15 =
  34. 34.4 × 15 =
  35. 35.56 × 15 =
  36. 36.61 × 15 =
  37. 37.24 × 15 =
  38. 38.33 × 15 =
  39. 39.24 × 15 =
  40. 40.40 × 15 =

Answer key

  1. 225
  2. 870
  3. 120
  4. 480
  5. 345
  6. 435
  7. 915
  8. 615
  9. 150
  10. 330
  11. 645
  12. 345
  13. 405
  14. 120
  15. 240
  16. 420
  17. 165
  18. 690
  19. 255
  20. 240
  21. 60
  22. 300
  23. 705
  24. 570
  25. 960
  26. 825
  27. 885
  28. 720
  29. 510
  30. 570
  31. 600
  32. 330
  33. 210
  34. 60
  35. 840
  36. 915
  37. 360
  38. 495
  39. 360
  40. 600

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