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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 732 · 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. 1.68 × 5 =
  2. 2.84 × 50 =
  3. 3.48 × 5 =
  4. 4.84 × 5 =
  5. 5.89 × 50 =
  6. 6.70 × 5 =
  7. 7.79 × 50 =
  8. 8.43 × 5 =
  9. 9.16 × 50 =
  10. 10.29 × 5 =
  11. 11.36 × 50 =
  12. 12.17 × 5 =
  13. 13.36 × 5 =
  14. 14.92 × 50 =
  15. 15.13 × 5 =
  16. 16.75 × 5 =
  17. 17.26 × 5 =
  18. 18.80 × 50 =
  19. 19.57 × 50 =
  20. 20.90 × 50 =
  21. 21.13 × 50 =
  22. 22.67 × 5 =
  23. 23.85 × 50 =
  24. 24.35 × 50 =
  25. 25.68 × 5 =
  26. 26.88 × 5 =
  27. 27.42 × 5 =
  28. 28.91 × 50 =
  29. 29.12 × 5 =
  30. 30.62 × 50 =
  31. 31.93 × 50 =
  32. 32.38 × 50 =
  33. 33.17 × 5 =
  34. 34.58 × 50 =
  35. 35.34 × 50 =
  36. 36.93 × 50 =
  37. 37.65 × 5 =
  38. 38.18 × 50 =
  39. 39.71 × 50 =
  40. 40.81 × 5 =

Answer key

  1. 340
  2. 4200
  3. 240
  4. 420
  5. 4450
  6. 350
  7. 3950
  8. 215
  9. 800
  10. 145
  11. 1800
  12. 85
  13. 180
  14. 4600
  15. 65
  16. 375
  17. 130
  18. 4000
  19. 2850
  20. 4500
  21. 650
  22. 335
  23. 4250
  24. 1750
  25. 340
  26. 440
  27. 210
  28. 4550
  29. 60
  30. 3100
  31. 4650
  32. 1900
  33. 85
  34. 2900
  35. 1700
  36. 4650
  37. 325
  38. 900
  39. 3550
  40. 405

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