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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 842 · 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. 1.81 × 50 =
  2. 2.30 × 5 =
  3. 3.78 × 50 =
  4. 4.25 × 50 =
  5. 5.86 × 50 =
  6. 6.70 × 5 =
  7. 7.43 × 5 =
  8. 8.12 × 50 =
  9. 9.78 × 50 =
  10. 10.28 × 50 =
  11. 11.72 × 5 =
  12. 12.46 × 5 =
  13. 13.43 × 5 =
  14. 14.51 × 50 =
  15. 15.36 × 50 =
  16. 16.42 × 5 =
  17. 17.97 × 50 =
  18. 18.94 × 50 =
  19. 19.48 × 50 =
  20. 20.46 × 50 =
  21. 21.26 × 50 =
  22. 22.41 × 5 =
  23. 23.96 × 5 =
  24. 24.75 × 50 =
  25. 25.58 × 50 =
  26. 26.90 × 50 =
  27. 27.43 × 50 =
  28. 28.28 × 5 =
  29. 29.92 × 5 =
  30. 30.90 × 50 =
  31. 31.98 × 50 =
  32. 32.19 × 5 =
  33. 33.49 × 5 =
  34. 34.14 × 50 =
  35. 35.27 × 50 =
  36. 36.83 × 5 =
  37. 37.38 × 50 =
  38. 38.23 × 5 =
  39. 39.23 × 5 =
  40. 40.35 × 50 =

Answer key

  1. 4050
  2. 150
  3. 3900
  4. 1250
  5. 4300
  6. 350
  7. 215
  8. 600
  9. 3900
  10. 1400
  11. 360
  12. 230
  13. 215
  14. 2550
  15. 1800
  16. 210
  17. 4850
  18. 4700
  19. 2400
  20. 2300
  21. 1300
  22. 205
  23. 480
  24. 3750
  25. 2900
  26. 4500
  27. 2150
  28. 140
  29. 460
  30. 4500
  31. 4900
  32. 95
  33. 245
  34. 700
  35. 1350
  36. 415
  37. 1900
  38. 115
  39. 115
  40. 1750

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