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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 159 · 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. 1.61 × 15 =
  2. 2.20 × 15 =
  3. 3.7 × 15 =
  4. 4.7 × 15 =
  5. 5.64 × 15 =
  6. 6.45 × 15 =
  7. 7.53 × 15 =
  8. 8.23 × 15 =
  9. 9.28 × 15 =
  10. 10.16 × 15 =
  11. 11.15 × 15 =
  12. 12.47 × 15 =
  13. 13.4 × 15 =
  14. 14.14 × 15 =
  15. 15.11 × 15 =
  16. 16.45 × 15 =
  17. 17.24 × 15 =
  18. 18.63 × 15 =
  19. 19.23 × 15 =
  20. 20.63 × 15 =
  21. 21.32 × 15 =
  22. 22.8 × 15 =
  23. 23.51 × 15 =
  24. 24.61 × 15 =
  25. 25.30 × 15 =
  26. 26.10 × 15 =
  27. 27.19 × 15 =
  28. 28.24 × 15 =
  29. 29.39 × 15 =
  30. 30.40 × 15 =
  31. 31.48 × 15 =
  32. 32.17 × 15 =
  33. 33.59 × 15 =
  34. 34.25 × 15 =
  35. 35.41 × 15 =
  36. 36.58 × 15 =
  37. 37.36 × 15 =
  38. 38.15 × 15 =
  39. 39.50 × 15 =
  40. 40.48 × 15 =

Answer key

  1. 915
  2. 300
  3. 105
  4. 105
  5. 960
  6. 675
  7. 795
  8. 345
  9. 420
  10. 240
  11. 225
  12. 705
  13. 60
  14. 210
  15. 165
  16. 675
  17. 360
  18. 945
  19. 345
  20. 945
  21. 480
  22. 120
  23. 765
  24. 915
  25. 450
  26. 150
  27. 285
  28. 360
  29. 585
  30. 600
  31. 720
  32. 255
  33. 885
  34. 375
  35. 615
  36. 870
  37. 540
  38. 225
  39. 750
  40. 720

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