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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 911 · 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. 1.24 × 5 =
  2. 2.72 × 50 =
  3. 3.79 × 5 =
  4. 4.70 × 5 =
  5. 5.19 × 5 =
  6. 6.46 × 5 =
  7. 7.93 × 50 =
  8. 8.42 × 50 =
  9. 9.63 × 50 =
  10. 10.74 × 50 =
  11. 11.35 × 50 =
  12. 12.57 × 5 =
  13. 13.60 × 5 =
  14. 14.12 × 5 =
  15. 15.39 × 50 =
  16. 16.79 × 5 =
  17. 17.91 × 5 =
  18. 18.73 × 5 =
  19. 19.60 × 5 =
  20. 20.91 × 5 =
  21. 21.13 × 5 =
  22. 22.19 × 5 =
  23. 23.94 × 50 =
  24. 24.94 × 5 =
  25. 25.61 × 50 =
  26. 26.57 × 50 =
  27. 27.79 × 50 =
  28. 28.90 × 5 =
  29. 29.63 × 5 =
  30. 30.29 × 50 =
  31. 31.22 × 5 =
  32. 32.44 × 5 =
  33. 33.52 × 50 =
  34. 34.14 × 5 =
  35. 35.43 × 5 =
  36. 36.54 × 5 =
  37. 37.78 × 50 =
  38. 38.97 × 5 =
  39. 39.20 × 50 =
  40. 40.88 × 50 =

Answer key

  1. 120
  2. 3600
  3. 395
  4. 350
  5. 95
  6. 230
  7. 4650
  8. 2100
  9. 3150
  10. 3700
  11. 1750
  12. 285
  13. 300
  14. 60
  15. 1950
  16. 395
  17. 455
  18. 365
  19. 300
  20. 455
  21. 65
  22. 95
  23. 4700
  24. 470
  25. 3050
  26. 2850
  27. 3950
  28. 450
  29. 315
  30. 1450
  31. 110
  32. 220
  33. 2600
  34. 70
  35. 215
  36. 270
  37. 3900
  38. 485
  39. 1000
  40. 4400

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