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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 9 · 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. 1.51 × 15 =
  2. 2.58 × 15 =
  3. 3.36 × 15 =
  4. 4.62 × 15 =
  5. 5.28 × 15 =
  6. 6.45 × 15 =
  7. 7.55 × 15 =
  8. 8.26 × 15 =
  9. 9.56 × 15 =
  10. 10.33 × 15 =
  11. 11.10 × 15 =
  12. 12.53 × 15 =
  13. 13.64 × 15 =
  14. 14.31 × 15 =
  15. 15.28 × 15 =
  16. 16.20 × 15 =
  17. 17.22 × 15 =
  18. 18.47 × 15 =
  19. 19.19 × 15 =
  20. 20.52 × 15 =
  21. 21.10 × 15 =
  22. 22.32 × 15 =
  23. 23.28 × 15 =
  24. 24.49 × 15 =
  25. 25.50 × 15 =
  26. 26.40 × 15 =
  27. 27.56 × 15 =
  28. 28.6 × 15 =
  29. 29.49 × 15 =
  30. 30.7 × 15 =
  31. 31.26 × 15 =
  32. 32.61 × 15 =
  33. 33.6 × 15 =
  34. 34.43 × 15 =
  35. 35.17 × 15 =
  36. 36.31 × 15 =
  37. 37.15 × 15 =
  38. 38.46 × 15 =
  39. 39.55 × 15 =
  40. 40.19 × 15 =

Answer key

  1. 765
  2. 870
  3. 540
  4. 930
  5. 420
  6. 675
  7. 825
  8. 390
  9. 840
  10. 495
  11. 150
  12. 795
  13. 960
  14. 465
  15. 420
  16. 300
  17. 330
  18. 705
  19. 285
  20. 780
  21. 150
  22. 480
  23. 420
  24. 735
  25. 750
  26. 600
  27. 840
  28. 90
  29. 735
  30. 105
  31. 390
  32. 915
  33. 90
  34. 645
  35. 255
  36. 465
  37. 225
  38. 690
  39. 825
  40. 285

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