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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 625 · 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. 1.25 × 50 =
  2. 2.42 × 5 =
  3. 3.49 × 5 =
  4. 4.58 × 50 =
  5. 5.67 × 5 =
  6. 6.55 × 5 =
  7. 7.69 × 50 =
  8. 8.18 × 50 =
  9. 9.64 × 5 =
  10. 10.91 × 5 =
  11. 11.30 × 5 =
  12. 12.64 × 5 =
  13. 13.41 × 50 =
  14. 14.60 × 5 =
  15. 15.32 × 50 =
  16. 16.35 × 50 =
  17. 17.81 × 50 =
  18. 18.50 × 5 =
  19. 19.66 × 5 =
  20. 20.96 × 5 =
  21. 21.13 × 5 =
  22. 22.83 × 5 =
  23. 23.96 × 50 =
  24. 24.35 × 50 =
  25. 25.45 × 50 =
  26. 26.78 × 5 =
  27. 27.45 × 50 =
  28. 28.39 × 50 =
  29. 29.94 × 5 =
  30. 30.16 × 50 =
  31. 31.70 × 5 =
  32. 32.39 × 50 =
  33. 33.63 × 50 =
  34. 34.47 × 5 =
  35. 35.82 × 50 =
  36. 36.94 × 50 =
  37. 37.72 × 50 =
  38. 38.52 × 50 =
  39. 39.86 × 5 =
  40. 40.34 × 50 =

Answer key

  1. 1250
  2. 210
  3. 245
  4. 2900
  5. 335
  6. 275
  7. 3450
  8. 900
  9. 320
  10. 455
  11. 150
  12. 320
  13. 2050
  14. 300
  15. 1600
  16. 1750
  17. 4050
  18. 250
  19. 330
  20. 480
  21. 65
  22. 415
  23. 4800
  24. 1750
  25. 2250
  26. 390
  27. 2250
  28. 1950
  29. 470
  30. 800
  31. 350
  32. 1950
  33. 3150
  34. 235
  35. 4100
  36. 4700
  37. 3600
  38. 2600
  39. 430
  40. 1700

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