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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 703 · 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. 1.55 × 15 =
  2. 2.39 × 15 =
  3. 3.14 × 15 =
  4. 4.12 × 15 =
  5. 5.38 × 15 =
  6. 6.60 × 15 =
  7. 7.20 × 15 =
  8. 8.21 × 15 =
  9. 9.20 × 15 =
  10. 10.4 × 15 =
  11. 11.64 × 15 =
  12. 12.54 × 15 =
  13. 13.51 × 15 =
  14. 14.47 × 15 =
  15. 15.43 × 15 =
  16. 16.29 × 15 =
  17. 17.59 × 15 =
  18. 18.22 × 15 =
  19. 19.45 × 15 =
  20. 20.8 × 15 =
  21. 21.25 × 15 =
  22. 22.6 × 15 =
  23. 23.19 × 15 =
  24. 24.25 × 15 =
  25. 25.36 × 15 =
  26. 26.5 × 15 =
  27. 27.27 × 15 =
  28. 28.23 × 15 =
  29. 29.38 × 15 =
  30. 30.48 × 15 =
  31. 31.32 × 15 =
  32. 32.41 × 15 =
  33. 33.62 × 15 =
  34. 34.40 × 15 =
  35. 35.20 × 15 =
  36. 36.25 × 15 =
  37. 37.52 × 15 =
  38. 38.59 × 15 =
  39. 39.64 × 15 =
  40. 40.47 × 15 =

Answer key

  1. 825
  2. 585
  3. 210
  4. 180
  5. 570
  6. 900
  7. 300
  8. 315
  9. 300
  10. 60
  11. 960
  12. 810
  13. 765
  14. 705
  15. 645
  16. 435
  17. 885
  18. 330
  19. 675
  20. 120
  21. 375
  22. 90
  23. 285
  24. 375
  25. 540
  26. 75
  27. 405
  28. 345
  29. 570
  30. 720
  31. 480
  32. 615
  33. 930
  34. 600
  35. 300
  36. 375
  37. 780
  38. 885
  39. 960
  40. 705

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