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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 629 · 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. 1.70 × 5 =
  2. 2.83 × 5 =
  3. 3.66 × 5 =
  4. 4.38 × 5 =
  5. 5.18 × 50 =
  6. 6.92 × 50 =
  7. 7.16 × 5 =
  8. 8.29 × 50 =
  9. 9.21 × 5 =
  10. 10.20 × 50 =
  11. 11.23 × 5 =
  12. 12.70 × 50 =
  13. 13.46 × 5 =
  14. 14.56 × 50 =
  15. 15.57 × 50 =
  16. 16.17 × 5 =
  17. 17.52 × 50 =
  18. 18.92 × 50 =
  19. 19.79 × 50 =
  20. 20.72 × 5 =
  21. 21.28 × 50 =
  22. 22.54 × 5 =
  23. 23.79 × 5 =
  24. 24.81 × 50 =
  25. 25.81 × 50 =
  26. 26.50 × 5 =
  27. 27.59 × 5 =
  28. 28.26 × 5 =
  29. 29.26 × 5 =
  30. 30.20 × 50 =
  31. 31.17 × 50 =
  32. 32.72 × 5 =
  33. 33.21 × 50 =
  34. 34.28 × 5 =
  35. 35.17 × 5 =
  36. 36.85 × 50 =
  37. 37.34 × 5 =
  38. 38.71 × 5 =
  39. 39.59 × 5 =
  40. 40.58 × 50 =

Answer key

  1. 350
  2. 415
  3. 330
  4. 190
  5. 900
  6. 4600
  7. 80
  8. 1450
  9. 105
  10. 1000
  11. 115
  12. 3500
  13. 230
  14. 2800
  15. 2850
  16. 85
  17. 2600
  18. 4600
  19. 3950
  20. 360
  21. 1400
  22. 270
  23. 395
  24. 4050
  25. 4050
  26. 250
  27. 295
  28. 130
  29. 130
  30. 1000
  31. 850
  32. 360
  33. 1050
  34. 140
  35. 85
  36. 4250
  37. 170
  38. 355
  39. 295
  40. 2900

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