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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 829 · 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. 1.45 × 15 =
  2. 2.45 × 15 =
  3. 3.49 × 15 =
  4. 4.16 × 15 =
  5. 5.36 × 15 =
  6. 6.30 × 15 =
  7. 7.34 × 15 =
  8. 8.52 × 15 =
  9. 9.25 × 15 =
  10. 10.61 × 15 =
  11. 11.24 × 15 =
  12. 12.51 × 15 =
  13. 13.53 × 15 =
  14. 14.54 × 15 =
  15. 15.22 × 15 =
  16. 16.46 × 15 =
  17. 17.57 × 15 =
  18. 18.22 × 15 =
  19. 19.19 × 15 =
  20. 20.5 × 15 =
  21. 21.49 × 15 =
  22. 22.26 × 15 =
  23. 23.58 × 15 =
  24. 24.58 × 15 =
  25. 25.57 × 15 =
  26. 26.64 × 15 =
  27. 27.28 × 15 =
  28. 28.35 × 15 =
  29. 29.59 × 15 =
  30. 30.24 × 15 =
  31. 31.33 × 15 =
  32. 32.11 × 15 =
  33. 33.47 × 15 =
  34. 34.61 × 15 =
  35. 35.5 × 15 =
  36. 36.52 × 15 =
  37. 37.17 × 15 =
  38. 38.6 × 15 =
  39. 39.9 × 15 =
  40. 40.5 × 15 =

Answer key

  1. 675
  2. 675
  3. 735
  4. 240
  5. 540
  6. 450
  7. 510
  8. 780
  9. 375
  10. 915
  11. 360
  12. 765
  13. 795
  14. 810
  15. 330
  16. 690
  17. 855
  18. 330
  19. 285
  20. 75
  21. 735
  22. 390
  23. 870
  24. 870
  25. 855
  26. 960
  27. 420
  28. 525
  29. 885
  30. 360
  31. 495
  32. 165
  33. 705
  34. 915
  35. 75
  36. 780
  37. 255
  38. 90
  39. 135
  40. 75

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