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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 985 · 40 questions
TalentJR

The fast method (Halve first): Halve the number. × 5: multiply the half by 10. × 50: multiply the half by 100. Odd number? Its half ends in .5 — 43 → 21.5 — and × 10 moves the point: 215.

NameDateTime takenScore ___ / 40
  1. 1.89 × 50 =
  2. 2.79 × 50 =
  3. 3.93 × 5 =
  4. 4.39 × 5 =
  5. 5.71 × 5 =
  6. 6.31 × 5 =
  7. 7.16 × 5 =
  8. 8.56 × 50 =
  9. 9.14 × 5 =
  10. 10.81 × 50 =
  11. 11.39 × 50 =
  12. 12.37 × 50 =
  13. 13.41 × 50 =
  14. 14.16 × 5 =
  15. 15.83 × 5 =
  16. 16.30 × 5 =
  17. 17.80 × 50 =
  18. 18.50 × 50 =
  19. 19.97 × 5 =
  20. 20.14 × 50 =
  21. 21.21 × 5 =
  22. 22.84 × 5 =
  23. 23.93 × 5 =
  24. 24.21 × 5 =
  25. 25.74 × 50 =
  26. 26.67 × 5 =
  27. 27.63 × 50 =
  28. 28.87 × 50 =
  29. 29.37 × 50 =
  30. 30.27 × 5 =
  31. 31.76 × 50 =
  32. 32.87 × 5 =
  33. 33.59 × 50 =
  34. 34.34 × 5 =
  35. 35.16 × 5 =
  36. 36.77 × 5 =
  37. 37.33 × 50 =
  38. 38.26 × 50 =
  39. 39.13 × 5 =
  40. 40.34 × 50 =

Answer key

  1. 4450
  2. 3950
  3. 465
  4. 195
  5. 355
  6. 155
  7. 80
  8. 2800
  9. 70
  10. 4050
  11. 1950
  12. 1850
  13. 2050
  14. 80
  15. 415
  16. 150
  17. 4000
  18. 2500
  19. 485
  20. 700
  21. 105
  22. 420
  23. 465
  24. 105
  25. 3700
  26. 335
  27. 3150
  28. 4350
  29. 1850
  30. 135
  31. 3800
  32. 435
  33. 2950
  34. 170
  35. 80
  36. 385
  37. 1650
  38. 1300
  39. 65
  40. 1700

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