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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 674 · 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. 2.54 × 15 =
  3. 3.58 × 15 =
  4. 4.28 × 15 =
  5. 5.36 × 15 =
  6. 6.15 × 15 =
  7. 7.51 × 15 =
  8. 8.54 × 15 =
  9. 9.24 × 15 =
  10. 10.12 × 15 =
  11. 11.44 × 15 =
  12. 12.42 × 15 =
  13. 13.45 × 15 =
  14. 14.63 × 15 =
  15. 15.5 × 15 =
  16. 16.8 × 15 =
  17. 17.17 × 15 =
  18. 18.46 × 15 =
  19. 19.51 × 15 =
  20. 20.35 × 15 =
  21. 21.40 × 15 =
  22. 22.17 × 15 =
  23. 23.42 × 15 =
  24. 24.16 × 15 =
  25. 25.31 × 15 =
  26. 26.11 × 15 =
  27. 27.51 × 15 =
  28. 28.22 × 15 =
  29. 29.55 × 15 =
  30. 30.5 × 15 =
  31. 31.45 × 15 =
  32. 32.19 × 15 =
  33. 33.33 × 15 =
  34. 34.36 × 15 =
  35. 35.50 × 15 =
  36. 36.46 × 15 =
  37. 37.7 × 15 =
  38. 38.62 × 15 =
  39. 39.19 × 15 =
  40. 40.7 × 15 =

Answer key

  1. 120
  2. 810
  3. 870
  4. 420
  5. 540
  6. 225
  7. 765
  8. 810
  9. 360
  10. 180
  11. 660
  12. 630
  13. 675
  14. 945
  15. 75
  16. 120
  17. 255
  18. 690
  19. 765
  20. 525
  21. 600
  22. 255
  23. 630
  24. 240
  25. 465
  26. 165
  27. 765
  28. 330
  29. 825
  30. 75
  31. 675
  32. 285
  33. 495
  34. 540
  35. 750
  36. 690
  37. 105
  38. 930
  39. 285
  40. 105

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