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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 959 · 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. 1.8 × 15 =
  2. 2.57 × 15 =
  3. 3.63 × 15 =
  4. 4.24 × 15 =
  5. 5.30 × 15 =
  6. 6.59 × 15 =
  7. 7.31 × 15 =
  8. 8.43 × 15 =
  9. 9.56 × 15 =
  10. 10.28 × 15 =
  11. 11.41 × 15 =
  12. 12.55 × 15 =
  13. 13.7 × 15 =
  14. 14.15 × 15 =
  15. 15.27 × 15 =
  16. 16.4 × 15 =
  17. 17.15 × 15 =
  18. 18.56 × 15 =
  19. 19.43 × 15 =
  20. 20.62 × 15 =
  21. 21.29 × 15 =
  22. 22.32 × 15 =
  23. 23.7 × 15 =
  24. 24.27 × 15 =
  25. 25.35 × 15 =
  26. 26.57 × 15 =
  27. 27.7 × 15 =
  28. 28.5 × 15 =
  29. 29.20 × 15 =
  30. 30.62 × 15 =
  31. 31.7 × 15 =
  32. 32.20 × 15 =
  33. 33.7 × 15 =
  34. 34.59 × 15 =
  35. 35.24 × 15 =
  36. 36.51 × 15 =
  37. 37.23 × 15 =
  38. 38.15 × 15 =
  39. 39.59 × 15 =
  40. 40.34 × 15 =

Answer key

  1. 120
  2. 855
  3. 945
  4. 360
  5. 450
  6. 885
  7. 465
  8. 645
  9. 840
  10. 420
  11. 615
  12. 825
  13. 105
  14. 225
  15. 405
  16. 60
  17. 225
  18. 840
  19. 645
  20. 930
  21. 435
  22. 480
  23. 105
  24. 405
  25. 525
  26. 855
  27. 105
  28. 75
  29. 300
  30. 930
  31. 105
  32. 300
  33. 105
  34. 885
  35. 360
  36. 765
  37. 345
  38. 225
  39. 885
  40. 510

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