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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 728 · 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. 1.96 × 50 =
  2. 2.80 × 5 =
  3. 3.77 × 5 =
  4. 4.19 × 5 =
  5. 5.20 × 50 =
  6. 6.33 × 5 =
  7. 7.35 × 5 =
  8. 8.77 × 5 =
  9. 9.54 × 50 =
  10. 10.41 × 5 =
  11. 11.16 × 5 =
  12. 12.63 × 50 =
  13. 13.92 × 50 =
  14. 14.48 × 5 =
  15. 15.28 × 5 =
  16. 16.82 × 5 =
  17. 17.39 × 5 =
  18. 18.77 × 50 =
  19. 19.36 × 5 =
  20. 20.84 × 50 =
  21. 21.57 × 50 =
  22. 22.36 × 5 =
  23. 23.27 × 5 =
  24. 24.58 × 50 =
  25. 25.66 × 50 =
  26. 26.38 × 50 =
  27. 27.35 × 50 =
  28. 28.63 × 50 =
  29. 29.83 × 5 =
  30. 30.16 × 50 =
  31. 31.75 × 50 =
  32. 32.71 × 5 =
  33. 33.59 × 50 =
  34. 34.87 × 5 =
  35. 35.61 × 50 =
  36. 36.48 × 50 =
  37. 37.35 × 5 =
  38. 38.63 × 5 =
  39. 39.24 × 50 =
  40. 40.56 × 5 =

Answer key

  1. 4800
  2. 400
  3. 385
  4. 95
  5. 1000
  6. 165
  7. 175
  8. 385
  9. 2700
  10. 205
  11. 80
  12. 3150
  13. 4600
  14. 240
  15. 140
  16. 410
  17. 195
  18. 3850
  19. 180
  20. 4200
  21. 2850
  22. 180
  23. 135
  24. 2900
  25. 3300
  26. 1900
  27. 1750
  28. 3150
  29. 415
  30. 800
  31. 3750
  32. 355
  33. 2950
  34. 435
  35. 3050
  36. 2400
  37. 175
  38. 315
  39. 1200
  40. 280

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