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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 83 · 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. 1.32 × 50 =
  2. 2.68 × 5 =
  3. 3.96 × 50 =
  4. 4.59 × 50 =
  5. 5.71 × 50 =
  6. 6.20 × 50 =
  7. 7.77 × 50 =
  8. 8.38 × 50 =
  9. 9.75 × 5 =
  10. 10.87 × 50 =
  11. 11.82 × 50 =
  12. 12.15 × 50 =
  13. 13.37 × 50 =
  14. 14.94 × 5 =
  15. 15.96 × 5 =
  16. 16.93 × 50 =
  17. 17.16 × 5 =
  18. 18.44 × 50 =
  19. 19.67 × 50 =
  20. 20.38 × 50 =
  21. 21.84 × 5 =
  22. 22.21 × 5 =
  23. 23.43 × 5 =
  24. 24.27 × 5 =
  25. 25.49 × 50 =
  26. 26.40 × 5 =
  27. 27.62 × 5 =
  28. 28.24 × 5 =
  29. 29.39 × 5 =
  30. 30.86 × 50 =
  31. 31.42 × 5 =
  32. 32.37 × 50 =
  33. 33.25 × 5 =
  34. 34.87 × 5 =
  35. 35.17 × 50 =
  36. 36.66 × 5 =
  37. 37.36 × 5 =
  38. 38.50 × 5 =
  39. 39.27 × 50 =
  40. 40.40 × 5 =

Answer key

  1. 1600
  2. 340
  3. 4800
  4. 2950
  5. 3550
  6. 1000
  7. 3850
  8. 1900
  9. 375
  10. 4350
  11. 4100
  12. 750
  13. 1850
  14. 470
  15. 480
  16. 4650
  17. 80
  18. 2200
  19. 3350
  20. 1900
  21. 420
  22. 105
  23. 215
  24. 135
  25. 2450
  26. 200
  27. 310
  28. 120
  29. 195
  30. 4300
  31. 210
  32. 1850
  33. 125
  34. 435
  35. 850
  36. 330
  37. 180
  38. 250
  39. 1350
  40. 200

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