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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 940 · 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. 1.25 × 15 =
  2. 2.49 × 15 =
  3. 3.47 × 15 =
  4. 4.61 × 15 =
  5. 5.18 × 15 =
  6. 6.33 × 15 =
  7. 7.20 × 15 =
  8. 8.56 × 15 =
  9. 9.39 × 15 =
  10. 10.6 × 15 =
  11. 11.17 × 15 =
  12. 12.56 × 15 =
  13. 13.4 × 15 =
  14. 14.36 × 15 =
  15. 15.62 × 15 =
  16. 16.22 × 15 =
  17. 17.48 × 15 =
  18. 18.57 × 15 =
  19. 19.48 × 15 =
  20. 20.60 × 15 =
  21. 21.29 × 15 =
  22. 22.42 × 15 =
  23. 23.49 × 15 =
  24. 24.52 × 15 =
  25. 25.56 × 15 =
  26. 26.44 × 15 =
  27. 27.53 × 15 =
  28. 28.17 × 15 =
  29. 29.17 × 15 =
  30. 30.5 × 15 =
  31. 31.12 × 15 =
  32. 32.8 × 15 =
  33. 33.5 × 15 =
  34. 34.26 × 15 =
  35. 35.55 × 15 =
  36. 36.42 × 15 =
  37. 37.42 × 15 =
  38. 38.55 × 15 =
  39. 39.11 × 15 =
  40. 40.59 × 15 =

Answer key

  1. 375
  2. 735
  3. 705
  4. 915
  5. 270
  6. 495
  7. 300
  8. 840
  9. 585
  10. 90
  11. 255
  12. 840
  13. 60
  14. 540
  15. 930
  16. 330
  17. 720
  18. 855
  19. 720
  20. 900
  21. 435
  22. 630
  23. 735
  24. 780
  25. 840
  26. 660
  27. 795
  28. 255
  29. 255
  30. 75
  31. 180
  32. 120
  33. 75
  34. 390
  35. 825
  36. 630
  37. 630
  38. 825
  39. 165
  40. 885

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