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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 498 · 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. 1.90 × 50 =
  2. 2.78 × 50 =
  3. 3.28 × 5 =
  4. 4.32 × 50 =
  5. 5.70 × 5 =
  6. 6.54 × 5 =
  7. 7.32 × 50 =
  8. 8.23 × 5 =
  9. 9.26 × 5 =
  10. 10.25 × 50 =
  11. 11.55 × 5 =
  12. 12.29 × 50 =
  13. 13.71 × 50 =
  14. 14.16 × 5 =
  15. 15.76 × 5 =
  16. 16.95 × 5 =
  17. 17.27 × 50 =
  18. 18.69 × 50 =
  19. 19.98 × 50 =
  20. 20.22 × 5 =
  21. 21.82 × 50 =
  22. 22.94 × 50 =
  23. 23.83 × 50 =
  24. 24.13 × 5 =
  25. 25.87 × 5 =
  26. 26.12 × 5 =
  27. 27.50 × 5 =
  28. 28.89 × 50 =
  29. 29.70 × 5 =
  30. 30.65 × 5 =
  31. 31.80 × 5 =
  32. 32.59 × 50 =
  33. 33.92 × 5 =
  34. 34.32 × 50 =
  35. 35.67 × 50 =
  36. 36.56 × 50 =
  37. 37.55 × 5 =
  38. 38.16 × 50 =
  39. 39.36 × 5 =
  40. 40.78 × 50 =

Answer key

  1. 4500
  2. 3900
  3. 140
  4. 1600
  5. 350
  6. 270
  7. 1600
  8. 115
  9. 130
  10. 1250
  11. 275
  12. 1450
  13. 3550
  14. 80
  15. 380
  16. 475
  17. 1350
  18. 3450
  19. 4900
  20. 110
  21. 4100
  22. 4700
  23. 4150
  24. 65
  25. 435
  26. 60
  27. 250
  28. 4450
  29. 350
  30. 325
  31. 400
  32. 2950
  33. 460
  34. 1600
  35. 3350
  36. 2800
  37. 275
  38. 800
  39. 180
  40. 3900

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