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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 218 · 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. 1.16 × 5 =
  2. 2.32 × 5 =
  3. 3.57 × 50 =
  4. 4.25 × 5 =
  5. 5.52 × 50 =
  6. 6.16 × 5 =
  7. 7.36 × 50 =
  8. 8.83 × 5 =
  9. 9.67 × 50 =
  10. 10.96 × 5 =
  11. 11.44 × 50 =
  12. 12.95 × 5 =
  13. 13.34 × 50 =
  14. 14.50 × 50 =
  15. 15.27 × 5 =
  16. 16.86 × 5 =
  17. 17.84 × 5 =
  18. 18.79 × 5 =
  19. 19.55 × 5 =
  20. 20.16 × 5 =
  21. 21.93 × 50 =
  22. 22.84 × 50 =
  23. 23.72 × 50 =
  24. 24.74 × 50 =
  25. 25.77 × 50 =
  26. 26.45 × 5 =
  27. 27.57 × 5 =
  28. 28.55 × 50 =
  29. 29.64 × 50 =
  30. 30.45 × 50 =
  31. 31.30 × 50 =
  32. 32.93 × 50 =
  33. 33.91 × 5 =
  34. 34.17 × 5 =
  35. 35.75 × 50 =
  36. 36.16 × 50 =
  37. 37.90 × 5 =
  38. 38.97 × 50 =
  39. 39.61 × 50 =
  40. 40.82 × 5 =

Answer key

  1. 80
  2. 160
  3. 2850
  4. 125
  5. 2600
  6. 80
  7. 1800
  8. 415
  9. 3350
  10. 480
  11. 2200
  12. 475
  13. 1700
  14. 2500
  15. 135
  16. 430
  17. 420
  18. 395
  19. 275
  20. 80
  21. 4650
  22. 4200
  23. 3600
  24. 3700
  25. 3850
  26. 225
  27. 285
  28. 2750
  29. 3200
  30. 2250
  31. 1500
  32. 4650
  33. 455
  34. 85
  35. 3750
  36. 800
  37. 450
  38. 4850
  39. 3050
  40. 410

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