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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 937 · 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. 1.47 × 15 =
  2. 2.21 × 15 =
  3. 3.42 × 15 =
  4. 4.61 × 15 =
  5. 5.19 × 15 =
  6. 6.59 × 15 =
  7. 7.59 × 15 =
  8. 8.33 × 15 =
  9. 9.56 × 15 =
  10. 10.24 × 15 =
  11. 11.63 × 15 =
  12. 12.38 × 15 =
  13. 13.50 × 15 =
  14. 14.50 × 15 =
  15. 15.4 × 15 =
  16. 16.28 × 15 =
  17. 17.14 × 15 =
  18. 18.24 × 15 =
  19. 19.24 × 15 =
  20. 20.59 × 15 =
  21. 21.28 × 15 =
  22. 22.60 × 15 =
  23. 23.22 × 15 =
  24. 24.11 × 15 =
  25. 25.41 × 15 =
  26. 26.21 × 15 =
  27. 27.15 × 15 =
  28. 28.54 × 15 =
  29. 29.17 × 15 =
  30. 30.15 × 15 =
  31. 31.30 × 15 =
  32. 32.45 × 15 =
  33. 33.28 × 15 =
  34. 34.33 × 15 =
  35. 35.31 × 15 =
  36. 36.39 × 15 =
  37. 37.25 × 15 =
  38. 38.27 × 15 =
  39. 39.7 × 15 =
  40. 40.55 × 15 =

Answer key

  1. 705
  2. 315
  3. 630
  4. 915
  5. 285
  6. 885
  7. 885
  8. 495
  9. 840
  10. 360
  11. 945
  12. 570
  13. 750
  14. 750
  15. 60
  16. 420
  17. 210
  18. 360
  19. 360
  20. 885
  21. 420
  22. 900
  23. 330
  24. 165
  25. 615
  26. 315
  27. 225
  28. 810
  29. 255
  30. 225
  31. 450
  32. 675
  33. 420
  34. 495
  35. 465
  36. 585
  37. 375
  38. 405
  39. 105
  40. 825

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