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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 102 · 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. 1.94 × 5 =
  2. 2.44 × 5 =
  3. 3.34 × 50 =
  4. 4.91 × 5 =
  5. 5.40 × 5 =
  6. 6.72 × 50 =
  7. 7.39 × 50 =
  8. 8.21 × 50 =
  9. 9.47 × 50 =
  10. 10.84 × 5 =
  11. 11.56 × 50 =
  12. 12.60 × 50 =
  13. 13.69 × 50 =
  14. 14.85 × 50 =
  15. 15.70 × 50 =
  16. 16.34 × 50 =
  17. 17.40 × 5 =
  18. 18.16 × 50 =
  19. 19.36 × 50 =
  20. 20.71 × 50 =
  21. 21.26 × 5 =
  22. 22.51 × 5 =
  23. 23.78 × 5 =
  24. 24.30 × 5 =
  25. 25.60 × 5 =
  26. 26.15 × 5 =
  27. 27.24 × 50 =
  28. 28.78 × 50 =
  29. 29.40 × 5 =
  30. 30.25 × 5 =
  31. 31.57 × 50 =
  32. 32.15 × 50 =
  33. 33.79 × 50 =
  34. 34.25 × 50 =
  35. 35.32 × 50 =
  36. 36.80 × 50 =
  37. 37.12 × 50 =
  38. 38.16 × 50 =
  39. 39.62 × 5 =
  40. 40.19 × 5 =

Answer key

  1. 470
  2. 220
  3. 1700
  4. 455
  5. 200
  6. 3600
  7. 1950
  8. 1050
  9. 2350
  10. 420
  11. 2800
  12. 3000
  13. 3450
  14. 4250
  15. 3500
  16. 1700
  17. 200
  18. 800
  19. 1800
  20. 3550
  21. 130
  22. 255
  23. 390
  24. 150
  25. 300
  26. 75
  27. 1200
  28. 3900
  29. 200
  30. 125
  31. 2850
  32. 750
  33. 3950
  34. 1250
  35. 1600
  36. 4000
  37. 600
  38. 800
  39. 310
  40. 95

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