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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 830 · 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. 1.69 × 50 =
  2. 2.37 × 5 =
  3. 3.43 × 50 =
  4. 4.34 × 5 =
  5. 5.12 × 5 =
  6. 6.83 × 5 =
  7. 7.30 × 50 =
  8. 8.31 × 5 =
  9. 9.83 × 5 =
  10. 10.84 × 5 =
  11. 11.77 × 5 =
  12. 12.74 × 50 =
  13. 13.58 × 50 =
  14. 14.72 × 50 =
  15. 15.58 × 50 =
  16. 16.27 × 50 =
  17. 17.49 × 50 =
  18. 18.35 × 5 =
  19. 19.13 × 5 =
  20. 20.55 × 50 =
  21. 21.37 × 50 =
  22. 22.39 × 50 =
  23. 23.54 × 5 =
  24. 24.64 × 5 =
  25. 25.84 × 5 =
  26. 26.44 × 5 =
  27. 27.54 × 5 =
  28. 28.82 × 50 =
  29. 29.39 × 50 =
  30. 30.27 × 50 =
  31. 31.19 × 5 =
  32. 32.23 × 5 =
  33. 33.89 × 5 =
  34. 34.27 × 50 =
  35. 35.81 × 50 =
  36. 36.43 × 5 =
  37. 37.84 × 50 =
  38. 38.80 × 5 =
  39. 39.44 × 5 =
  40. 40.34 × 50 =

Answer key

  1. 3450
  2. 185
  3. 2150
  4. 170
  5. 60
  6. 415
  7. 1500
  8. 155
  9. 415
  10. 420
  11. 385
  12. 3700
  13. 2900
  14. 3600
  15. 2900
  16. 1350
  17. 2450
  18. 175
  19. 65
  20. 2750
  21. 1850
  22. 1950
  23. 270
  24. 320
  25. 420
  26. 220
  27. 270
  28. 4100
  29. 1950
  30. 1350
  31. 95
  32. 115
  33. 445
  34. 1350
  35. 4050
  36. 215
  37. 4200
  38. 400
  39. 220
  40. 1700

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