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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 946 · 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. 1.72 × 50 =
  2. 2.39 × 50 =
  3. 3.81 × 5 =
  4. 4.12 × 5 =
  5. 5.61 × 50 =
  6. 6.21 × 5 =
  7. 7.78 × 50 =
  8. 8.78 × 50 =
  9. 9.21 × 50 =
  10. 10.34 × 5 =
  11. 11.25 × 5 =
  12. 12.70 × 5 =
  13. 13.32 × 50 =
  14. 14.27 × 5 =
  15. 15.13 × 50 =
  16. 16.78 × 50 =
  17. 17.69 × 5 =
  18. 18.79 × 5 =
  19. 19.56 × 5 =
  20. 20.59 × 5 =
  21. 21.58 × 5 =
  22. 22.43 × 50 =
  23. 23.48 × 50 =
  24. 24.92 × 5 =
  25. 25.23 × 50 =
  26. 26.46 × 5 =
  27. 27.71 × 5 =
  28. 28.44 × 5 =
  29. 29.82 × 50 =
  30. 30.34 × 50 =
  31. 31.93 × 5 =
  32. 32.78 × 50 =
  33. 33.58 × 5 =
  34. 34.50 × 50 =
  35. 35.46 × 5 =
  36. 36.12 × 50 =
  37. 37.20 × 50 =
  38. 38.66 × 50 =
  39. 39.69 × 50 =
  40. 40.27 × 50 =

Answer key

  1. 3600
  2. 1950
  3. 405
  4. 60
  5. 3050
  6. 105
  7. 3900
  8. 3900
  9. 1050
  10. 170
  11. 125
  12. 350
  13. 1600
  14. 135
  15. 650
  16. 3900
  17. 345
  18. 395
  19. 280
  20. 295
  21. 290
  22. 2150
  23. 2400
  24. 460
  25. 1150
  26. 230
  27. 355
  28. 220
  29. 4100
  30. 1700
  31. 465
  32. 3900
  33. 290
  34. 2500
  35. 230
  36. 600
  37. 1000
  38. 3300
  39. 3450
  40. 1350

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