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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 271 · 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. 1.49 × 50 =
  2. 2.51 × 50 =
  3. 3.28 × 5 =
  4. 4.13 × 5 =
  5. 5.25 × 5 =
  6. 6.31 × 5 =
  7. 7.94 × 50 =
  8. 8.52 × 5 =
  9. 9.94 × 50 =
  10. 10.79 × 50 =
  11. 11.14 × 50 =
  12. 12.27 × 50 =
  13. 13.88 × 5 =
  14. 14.88 × 5 =
  15. 15.81 × 50 =
  16. 16.55 × 5 =
  17. 17.62 × 5 =
  18. 18.60 × 5 =
  19. 19.51 × 50 =
  20. 20.82 × 5 =
  21. 21.22 × 5 =
  22. 22.64 × 5 =
  23. 23.27 × 50 =
  24. 24.71 × 5 =
  25. 25.36 × 5 =
  26. 26.84 × 50 =
  27. 27.17 × 5 =
  28. 28.33 × 50 =
  29. 29.72 × 50 =
  30. 30.46 × 5 =
  31. 31.16 × 5 =
  32. 32.27 × 5 =
  33. 33.93 × 5 =
  34. 34.25 × 5 =
  35. 35.91 × 50 =
  36. 36.38 × 5 =
  37. 37.63 × 50 =
  38. 38.30 × 5 =
  39. 39.62 × 5 =
  40. 40.12 × 5 =

Answer key

  1. 2450
  2. 2550
  3. 140
  4. 65
  5. 125
  6. 155
  7. 4700
  8. 260
  9. 4700
  10. 3950
  11. 700
  12. 1350
  13. 440
  14. 440
  15. 4050
  16. 275
  17. 310
  18. 300
  19. 2550
  20. 410
  21. 110
  22. 320
  23. 1350
  24. 355
  25. 180
  26. 4200
  27. 85
  28. 1650
  29. 3600
  30. 230
  31. 80
  32. 135
  33. 465
  34. 125
  35. 4550
  36. 190
  37. 3150
  38. 150
  39. 310
  40. 60

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