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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 281 · 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. 1.94 × 50 =
  2. 2.97 × 5 =
  3. 3.40 × 50 =
  4. 4.39 × 50 =
  5. 5.97 × 5 =
  6. 6.21 × 50 =
  7. 7.24 × 5 =
  8. 8.32 × 50 =
  9. 9.78 × 5 =
  10. 10.59 × 5 =
  11. 11.36 × 5 =
  12. 12.46 × 5 =
  13. 13.71 × 5 =
  14. 14.21 × 5 =
  15. 15.69 × 5 =
  16. 16.54 × 50 =
  17. 17.20 × 5 =
  18. 18.30 × 50 =
  19. 19.19 × 5 =
  20. 20.66 × 5 =
  21. 21.37 × 50 =
  22. 22.70 × 5 =
  23. 23.39 × 50 =
  24. 24.64 × 50 =
  25. 25.90 × 5 =
  26. 26.29 × 5 =
  27. 27.22 × 50 =
  28. 28.45 × 50 =
  29. 29.32 × 5 =
  30. 30.79 × 50 =
  31. 31.55 × 50 =
  32. 32.48 × 50 =
  33. 33.66 × 50 =
  34. 34.27 × 50 =
  35. 35.67 × 5 =
  36. 36.81 × 5 =
  37. 37.69 × 50 =
  38. 38.50 × 5 =
  39. 39.73 × 5 =
  40. 40.16 × 5 =

Answer key

  1. 4700
  2. 485
  3. 2000
  4. 1950
  5. 485
  6. 1050
  7. 120
  8. 1600
  9. 390
  10. 295
  11. 180
  12. 230
  13. 355
  14. 105
  15. 345
  16. 2700
  17. 100
  18. 1500
  19. 95
  20. 330
  21. 1850
  22. 350
  23. 1950
  24. 3200
  25. 450
  26. 145
  27. 1100
  28. 2250
  29. 160
  30. 3950
  31. 2750
  32. 2400
  33. 3300
  34. 1350
  35. 335
  36. 405
  37. 3450
  38. 250
  39. 365
  40. 80

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