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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 621 · 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. 1.85 × 5 =
  2. 2.92 × 50 =
  3. 3.19 × 50 =
  4. 4.27 × 5 =
  5. 5.55 × 5 =
  6. 6.23 × 5 =
  7. 7.23 × 50 =
  8. 8.19 × 5 =
  9. 9.25 × 50 =
  10. 10.64 × 5 =
  11. 11.22 × 50 =
  12. 12.57 × 5 =
  13. 13.20 × 50 =
  14. 14.76 × 50 =
  15. 15.17 × 50 =
  16. 16.70 × 50 =
  17. 17.60 × 50 =
  18. 18.83 × 5 =
  19. 19.18 × 50 =
  20. 20.55 × 5 =
  21. 21.90 × 5 =
  22. 22.72 × 5 =
  23. 23.61 × 50 =
  24. 24.17 × 5 =
  25. 25.14 × 50 =
  26. 26.26 × 50 =
  27. 27.50 × 5 =
  28. 28.28 × 50 =
  29. 29.43 × 50 =
  30. 30.15 × 50 =
  31. 31.73 × 5 =
  32. 32.38 × 50 =
  33. 33.87 × 50 =
  34. 34.14 × 5 =
  35. 35.16 × 5 =
  36. 36.21 × 5 =
  37. 37.56 × 50 =
  38. 38.24 × 5 =
  39. 39.76 × 50 =
  40. 40.52 × 50 =

Answer key

  1. 425
  2. 4600
  3. 950
  4. 135
  5. 275
  6. 115
  7. 1150
  8. 95
  9. 1250
  10. 320
  11. 1100
  12. 285
  13. 1000
  14. 3800
  15. 850
  16. 3500
  17. 3000
  18. 415
  19. 900
  20. 275
  21. 450
  22. 360
  23. 3050
  24. 85
  25. 700
  26. 1300
  27. 250
  28. 1400
  29. 2150
  30. 750
  31. 365
  32. 1900
  33. 4350
  34. 70
  35. 80
  36. 105
  37. 2800
  38. 120
  39. 3800
  40. 2600

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