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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 104 · 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. 1.55 × 15 =
  2. 2.54 × 15 =
  3. 3.18 × 15 =
  4. 4.5 × 15 =
  5. 5.61 × 15 =
  6. 6.21 × 15 =
  7. 7.19 × 15 =
  8. 8.10 × 15 =
  9. 9.18 × 15 =
  10. 10.16 × 15 =
  11. 11.52 × 15 =
  12. 12.39 × 15 =
  13. 13.47 × 15 =
  14. 14.57 × 15 =
  15. 15.36 × 15 =
  16. 16.53 × 15 =
  17. 17.21 × 15 =
  18. 18.45 × 15 =
  19. 19.50 × 15 =
  20. 20.37 × 15 =
  21. 21.18 × 15 =
  22. 22.5 × 15 =
  23. 23.31 × 15 =
  24. 24.27 × 15 =
  25. 25.51 × 15 =
  26. 26.25 × 15 =
  27. 27.17 × 15 =
  28. 28.23 × 15 =
  29. 29.4 × 15 =
  30. 30.16 × 15 =
  31. 31.61 × 15 =
  32. 32.21 × 15 =
  33. 33.64 × 15 =
  34. 34.7 × 15 =
  35. 35.6 × 15 =
  36. 36.39 × 15 =
  37. 37.37 × 15 =
  38. 38.11 × 15 =
  39. 39.47 × 15 =
  40. 40.28 × 15 =

Answer key

  1. 825
  2. 810
  3. 270
  4. 75
  5. 915
  6. 315
  7. 285
  8. 150
  9. 270
  10. 240
  11. 780
  12. 585
  13. 705
  14. 855
  15. 540
  16. 795
  17. 315
  18. 675
  19. 750
  20. 555
  21. 270
  22. 75
  23. 465
  24. 405
  25. 765
  26. 375
  27. 255
  28. 345
  29. 60
  30. 240
  31. 915
  32. 315
  33. 960
  34. 105
  35. 90
  36. 585
  37. 555
  38. 165
  39. 705
  40. 420

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