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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 467 · 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. 1.91 × 50 =
  2. 2.30 × 5 =
  3. 3.19 × 50 =
  4. 4.29 × 5 =
  5. 5.37 × 50 =
  6. 6.66 × 50 =
  7. 7.90 × 5 =
  8. 8.72 × 50 =
  9. 9.92 × 50 =
  10. 10.34 × 5 =
  11. 11.82 × 50 =
  12. 12.13 × 5 =
  13. 13.89 × 5 =
  14. 14.81 × 50 =
  15. 15.45 × 50 =
  16. 16.54 × 50 =
  17. 17.13 × 5 =
  18. 18.15 × 5 =
  19. 19.30 × 5 =
  20. 20.79 × 5 =
  21. 21.30 × 5 =
  22. 22.78 × 50 =
  23. 23.15 × 50 =
  24. 24.61 × 50 =
  25. 25.13 × 5 =
  26. 26.70 × 5 =
  27. 27.34 × 50 =
  28. 28.77 × 50 =
  29. 29.33 × 50 =
  30. 30.92 × 50 =
  31. 31.93 × 5 =
  32. 32.16 × 5 =
  33. 33.82 × 50 =
  34. 34.92 × 5 =
  35. 35.44 × 5 =
  36. 36.21 × 5 =
  37. 37.50 × 50 =
  38. 38.52 × 50 =
  39. 39.74 × 50 =
  40. 40.17 × 50 =

Answer key

  1. 4550
  2. 150
  3. 950
  4. 145
  5. 1850
  6. 3300
  7. 450
  8. 3600
  9. 4600
  10. 170
  11. 4100
  12. 65
  13. 445
  14. 4050
  15. 2250
  16. 2700
  17. 65
  18. 75
  19. 150
  20. 395
  21. 150
  22. 3900
  23. 750
  24. 3050
  25. 65
  26. 350
  27. 1700
  28. 3850
  29. 1650
  30. 4600
  31. 465
  32. 80
  33. 4100
  34. 460
  35. 220
  36. 105
  37. 2500
  38. 2600
  39. 3700
  40. 850

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