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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 400 · 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. 1.22 × 5 =
  2. 2.24 × 5 =
  3. 3.42 × 5 =
  4. 4.72 × 50 =
  5. 5.76 × 50 =
  6. 6.84 × 5 =
  7. 7.88 × 50 =
  8. 8.67 × 50 =
  9. 9.25 × 5 =
  10. 10.73 × 5 =
  11. 11.48 × 5 =
  12. 12.31 × 5 =
  13. 13.70 × 5 =
  14. 14.13 × 5 =
  15. 15.71 × 50 =
  16. 16.78 × 5 =
  17. 17.83 × 5 =
  18. 18.87 × 50 =
  19. 19.85 × 50 =
  20. 20.79 × 5 =
  21. 21.13 × 50 =
  22. 22.85 × 5 =
  23. 23.28 × 5 =
  24. 24.89 × 5 =
  25. 25.55 × 5 =
  26. 26.36 × 5 =
  27. 27.61 × 5 =
  28. 28.39 × 5 =
  29. 29.40 × 50 =
  30. 30.32 × 50 =
  31. 31.35 × 5 =
  32. 32.13 × 50 =
  33. 33.24 × 5 =
  34. 34.36 × 50 =
  35. 35.84 × 50 =
  36. 36.45 × 50 =
  37. 37.52 × 5 =
  38. 38.90 × 50 =
  39. 39.51 × 50 =
  40. 40.46 × 5 =

Answer key

  1. 110
  2. 120
  3. 210
  4. 3600
  5. 3800
  6. 420
  7. 4400
  8. 3350
  9. 125
  10. 365
  11. 240
  12. 155
  13. 350
  14. 65
  15. 3550
  16. 390
  17. 415
  18. 4350
  19. 4250
  20. 395
  21. 650
  22. 425
  23. 140
  24. 445
  25. 275
  26. 180
  27. 305
  28. 195
  29. 2000
  30. 1600
  31. 175
  32. 650
  33. 120
  34. 1800
  35. 4200
  36. 2250
  37. 260
  38. 4500
  39. 2550
  40. 230

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