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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 840 · 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. 1.41 × 50 =
  2. 2.74 × 50 =
  3. 3.28 × 5 =
  4. 4.52 × 5 =
  5. 5.79 × 50 =
  6. 6.89 × 5 =
  7. 7.21 × 5 =
  8. 8.48 × 5 =
  9. 9.20 × 5 =
  10. 10.12 × 5 =
  11. 11.27 × 50 =
  12. 12.54 × 50 =
  13. 13.32 × 50 =
  14. 14.89 × 50 =
  15. 15.69 × 50 =
  16. 16.25 × 5 =
  17. 17.25 × 50 =
  18. 18.12 × 5 =
  19. 19.31 × 5 =
  20. 20.96 × 5 =
  21. 21.64 × 5 =
  22. 22.70 × 5 =
  23. 23.36 × 5 =
  24. 24.50 × 50 =
  25. 25.83 × 5 =
  26. 26.43 × 5 =
  27. 27.12 × 5 =
  28. 28.45 × 5 =
  29. 29.88 × 5 =
  30. 30.29 × 50 =
  31. 31.66 × 5 =
  32. 32.88 × 50 =
  33. 33.36 × 50 =
  34. 34.38 × 50 =
  35. 35.73 × 5 =
  36. 36.78 × 50 =
  37. 37.41 × 50 =
  38. 38.51 × 50 =
  39. 39.51 × 50 =
  40. 40.62 × 5 =

Answer key

  1. 2050
  2. 3700
  3. 140
  4. 260
  5. 3950
  6. 445
  7. 105
  8. 240
  9. 100
  10. 60
  11. 1350
  12. 2700
  13. 1600
  14. 4450
  15. 3450
  16. 125
  17. 1250
  18. 60
  19. 155
  20. 480
  21. 320
  22. 350
  23. 180
  24. 2500
  25. 415
  26. 215
  27. 60
  28. 225
  29. 440
  30. 1450
  31. 330
  32. 4400
  33. 1800
  34. 1900
  35. 365
  36. 3900
  37. 2050
  38. 2550
  39. 2550
  40. 310

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