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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 255 · 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. 1.34 × 50 =
  2. 2.28 × 5 =
  3. 3.51 × 5 =
  4. 4.80 × 50 =
  5. 5.82 × 5 =
  6. 6.71 × 50 =
  7. 7.21 × 5 =
  8. 8.60 × 5 =
  9. 9.51 × 50 =
  10. 10.29 × 5 =
  11. 11.22 × 5 =
  12. 12.60 × 5 =
  13. 13.40 × 5 =
  14. 14.84 × 50 =
  15. 15.24 × 5 =
  16. 16.31 × 5 =
  17. 17.80 × 5 =
  18. 18.13 × 5 =
  19. 19.18 × 5 =
  20. 20.33 × 50 =
  21. 21.61 × 50 =
  22. 22.89 × 50 =
  23. 23.97 × 50 =
  24. 24.12 × 5 =
  25. 25.52 × 50 =
  26. 26.36 × 5 =
  27. 27.74 × 50 =
  28. 28.96 × 50 =
  29. 29.86 × 5 =
  30. 30.54 × 5 =
  31. 31.12 × 5 =
  32. 32.96 × 5 =
  33. 33.93 × 5 =
  34. 34.17 × 50 =
  35. 35.72 × 5 =
  36. 36.61 × 5 =
  37. 37.36 × 50 =
  38. 38.81 × 50 =
  39. 39.42 × 50 =
  40. 40.35 × 5 =

Answer key

  1. 1700
  2. 140
  3. 255
  4. 4000
  5. 410
  6. 3550
  7. 105
  8. 300
  9. 2550
  10. 145
  11. 110
  12. 300
  13. 200
  14. 4200
  15. 120
  16. 155
  17. 400
  18. 65
  19. 90
  20. 1650
  21. 3050
  22. 4450
  23. 4850
  24. 60
  25. 2600
  26. 180
  27. 3700
  28. 4800
  29. 430
  30. 270
  31. 60
  32. 480
  33. 465
  34. 850
  35. 360
  36. 305
  37. 1800
  38. 4050
  39. 2100
  40. 175

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