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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 920 · 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. 1.30 × 15 =
  2. 2.55 × 15 =
  3. 3.46 × 15 =
  4. 4.29 × 15 =
  5. 5.59 × 15 =
  6. 6.52 × 15 =
  7. 7.29 × 15 =
  8. 8.23 × 15 =
  9. 9.28 × 15 =
  10. 10.56 × 15 =
  11. 11.61 × 15 =
  12. 12.8 × 15 =
  13. 13.58 × 15 =
  14. 14.10 × 15 =
  15. 15.28 × 15 =
  16. 16.54 × 15 =
  17. 17.27 × 15 =
  18. 18.25 × 15 =
  19. 19.8 × 15 =
  20. 20.21 × 15 =
  21. 21.4 × 15 =
  22. 22.22 × 15 =
  23. 23.52 × 15 =
  24. 24.22 × 15 =
  25. 25.38 × 15 =
  26. 26.11 × 15 =
  27. 27.64 × 15 =
  28. 28.32 × 15 =
  29. 29.6 × 15 =
  30. 30.29 × 15 =
  31. 31.49 × 15 =
  32. 32.28 × 15 =
  33. 33.48 × 15 =
  34. 34.14 × 15 =
  35. 35.38 × 15 =
  36. 36.49 × 15 =
  37. 37.27 × 15 =
  38. 38.19 × 15 =
  39. 39.52 × 15 =
  40. 40.53 × 15 =

Answer key

  1. 450
  2. 825
  3. 690
  4. 435
  5. 885
  6. 780
  7. 435
  8. 345
  9. 420
  10. 840
  11. 915
  12. 120
  13. 870
  14. 150
  15. 420
  16. 810
  17. 405
  18. 375
  19. 120
  20. 315
  21. 60
  22. 330
  23. 780
  24. 330
  25. 570
  26. 165
  27. 960
  28. 480
  29. 90
  30. 435
  31. 735
  32. 420
  33. 720
  34. 210
  35. 570
  36. 735
  37. 405
  38. 285
  39. 780
  40. 795

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