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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 172 · 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. 1.28 × 15 =
  2. 2.32 × 15 =
  3. 3.6 × 15 =
  4. 4.11 × 15 =
  5. 5.42 × 15 =
  6. 6.17 × 15 =
  7. 7.11 × 15 =
  8. 8.59 × 15 =
  9. 9.19 × 15 =
  10. 10.55 × 15 =
  11. 11.58 × 15 =
  12. 12.38 × 15 =
  13. 13.23 × 15 =
  14. 14.39 × 15 =
  15. 15.44 × 15 =
  16. 16.19 × 15 =
  17. 17.19 × 15 =
  18. 18.50 × 15 =
  19. 19.11 × 15 =
  20. 20.31 × 15 =
  21. 21.52 × 15 =
  22. 22.26 × 15 =
  23. 23.49 × 15 =
  24. 24.22 × 15 =
  25. 25.50 × 15 =
  26. 26.21 × 15 =
  27. 27.33 × 15 =
  28. 28.24 × 15 =
  29. 29.29 × 15 =
  30. 30.51 × 15 =
  31. 31.22 × 15 =
  32. 32.23 × 15 =
  33. 33.19 × 15 =
  34. 34.43 × 15 =
  35. 35.54 × 15 =
  36. 36.5 × 15 =
  37. 37.25 × 15 =
  38. 38.4 × 15 =
  39. 39.35 × 15 =
  40. 40.27 × 15 =

Answer key

  1. 420
  2. 480
  3. 90
  4. 165
  5. 630
  6. 255
  7. 165
  8. 885
  9. 285
  10. 825
  11. 870
  12. 570
  13. 345
  14. 585
  15. 660
  16. 285
  17. 285
  18. 750
  19. 165
  20. 465
  21. 780
  22. 390
  23. 735
  24. 330
  25. 750
  26. 315
  27. 495
  28. 360
  29. 435
  30. 765
  31. 330
  32. 345
  33. 285
  34. 645
  35. 810
  36. 75
  37. 375
  38. 60
  39. 525
  40. 405

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