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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 334 · 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. 1.57 × 15 =
  2. 2.19 × 15 =
  3. 3.58 × 15 =
  4. 4.46 × 15 =
  5. 5.53 × 15 =
  6. 6.52 × 15 =
  7. 7.18 × 15 =
  8. 8.5 × 15 =
  9. 9.53 × 15 =
  10. 10.49 × 15 =
  11. 11.54 × 15 =
  12. 12.39 × 15 =
  13. 13.21 × 15 =
  14. 14.19 × 15 =
  15. 15.63 × 15 =
  16. 16.37 × 15 =
  17. 17.22 × 15 =
  18. 18.38 × 15 =
  19. 19.29 × 15 =
  20. 20.29 × 15 =
  21. 21.31 × 15 =
  22. 22.7 × 15 =
  23. 23.62 × 15 =
  24. 24.27 × 15 =
  25. 25.64 × 15 =
  26. 26.4 × 15 =
  27. 27.50 × 15 =
  28. 28.42 × 15 =
  29. 29.60 × 15 =
  30. 30.38 × 15 =
  31. 31.50 × 15 =
  32. 32.58 × 15 =
  33. 33.4 × 15 =
  34. 34.50 × 15 =
  35. 35.43 × 15 =
  36. 36.16 × 15 =
  37. 37.57 × 15 =
  38. 38.27 × 15 =
  39. 39.16 × 15 =
  40. 40.54 × 15 =

Answer key

  1. 855
  2. 285
  3. 870
  4. 690
  5. 795
  6. 780
  7. 270
  8. 75
  9. 795
  10. 735
  11. 810
  12. 585
  13. 315
  14. 285
  15. 945
  16. 555
  17. 330
  18. 570
  19. 435
  20. 435
  21. 465
  22. 105
  23. 930
  24. 405
  25. 960
  26. 60
  27. 750
  28. 630
  29. 900
  30. 570
  31. 750
  32. 870
  33. 60
  34. 750
  35. 645
  36. 240
  37. 855
  38. 405
  39. 240
  40. 810

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