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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 109 · 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. 1.71 × 5 =
  2. 2.54 × 5 =
  3. 3.31 × 5 =
  4. 4.56 × 5 =
  5. 5.85 × 50 =
  6. 6.83 × 50 =
  7. 7.64 × 5 =
  8. 8.76 × 50 =
  9. 9.79 × 5 =
  10. 10.25 × 5 =
  11. 11.82 × 50 =
  12. 12.24 × 5 =
  13. 13.97 × 50 =
  14. 14.18 × 5 =
  15. 15.97 × 50 =
  16. 16.66 × 50 =
  17. 17.18 × 5 =
  18. 18.32 × 5 =
  19. 19.69 × 5 =
  20. 20.15 × 5 =
  21. 21.87 × 5 =
  22. 22.24 × 50 =
  23. 23.20 × 5 =
  24. 24.63 × 50 =
  25. 25.88 × 50 =
  26. 26.73 × 50 =
  27. 27.14 × 5 =
  28. 28.46 × 5 =
  29. 29.54 × 50 =
  30. 30.84 × 50 =
  31. 31.36 × 5 =
  32. 32.87 × 50 =
  33. 33.45 × 5 =
  34. 34.23 × 50 =
  35. 35.56 × 50 =
  36. 36.89 × 5 =
  37. 37.41 × 5 =
  38. 38.37 × 5 =
  39. 39.68 × 50 =
  40. 40.55 × 5 =

Answer key

  1. 355
  2. 270
  3. 155
  4. 280
  5. 4250
  6. 4150
  7. 320
  8. 3800
  9. 395
  10. 125
  11. 4100
  12. 120
  13. 4850
  14. 90
  15. 4850
  16. 3300
  17. 90
  18. 160
  19. 345
  20. 75
  21. 435
  22. 1200
  23. 100
  24. 3150
  25. 4400
  26. 3650
  27. 70
  28. 230
  29. 2700
  30. 4200
  31. 180
  32. 4350
  33. 225
  34. 1150
  35. 2800
  36. 445
  37. 205
  38. 185
  39. 3400
  40. 275

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