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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 531 · 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. 2.83 × 50 =
  3. 3.39 × 5 =
  4. 4.62 × 50 =
  5. 5.91 × 50 =
  6. 6.79 × 5 =
  7. 7.57 × 50 =
  8. 8.63 × 50 =
  9. 9.64 × 5 =
  10. 10.45 × 5 =
  11. 11.42 × 5 =
  12. 12.14 × 50 =
  13. 13.60 × 5 =
  14. 14.28 × 50 =
  15. 15.45 × 5 =
  16. 16.79 × 50 =
  17. 17.36 × 50 =
  18. 18.53 × 50 =
  19. 19.27 × 50 =
  20. 20.21 × 50 =
  21. 21.56 × 50 =
  22. 22.33 × 50 =
  23. 23.79 × 5 =
  24. 24.19 × 50 =
  25. 25.45 × 50 =
  26. 26.81 × 50 =
  27. 27.18 × 5 =
  28. 28.20 × 50 =
  29. 29.62 × 50 =
  30. 30.31 × 5 =
  31. 31.24 × 5 =
  32. 32.28 × 50 =
  33. 33.94 × 5 =
  34. 34.94 × 5 =
  35. 35.45 × 5 =
  36. 36.56 × 50 =
  37. 37.22 × 50 =
  38. 38.34 × 50 =
  39. 39.17 × 5 =
  40. 40.90 × 5 =

Answer key

  1. 4700
  2. 4150
  3. 195
  4. 3100
  5. 4550
  6. 395
  7. 2850
  8. 3150
  9. 320
  10. 225
  11. 210
  12. 700
  13. 300
  14. 1400
  15. 225
  16. 3950
  17. 1800
  18. 2650
  19. 1350
  20. 1050
  21. 2800
  22. 1650
  23. 395
  24. 950
  25. 2250
  26. 4050
  27. 90
  28. 1000
  29. 3100
  30. 155
  31. 120
  32. 1400
  33. 470
  34. 470
  35. 225
  36. 2800
  37. 1100
  38. 1700
  39. 85
  40. 450

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