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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 28 · 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. 1.52 × 50 =
  2. 2.83 × 5 =
  3. 3.34 × 50 =
  4. 4.78 × 5 =
  5. 5.89 × 5 =
  6. 6.19 × 5 =
  7. 7.83 × 50 =
  8. 8.82 × 50 =
  9. 9.85 × 50 =
  10. 10.67 × 50 =
  11. 11.34 × 5 =
  12. 12.34 × 5 =
  13. 13.62 × 5 =
  14. 14.36 × 50 =
  15. 15.54 × 5 =
  16. 16.87 × 5 =
  17. 17.45 × 50 =
  18. 18.95 × 50 =
  19. 19.12 × 50 =
  20. 20.42 × 50 =
  21. 21.37 × 50 =
  22. 22.27 × 5 =
  23. 23.94 × 50 =
  24. 24.67 × 5 =
  25. 25.51 × 5 =
  26. 26.44 × 5 =
  27. 27.42 × 5 =
  28. 28.12 × 50 =
  29. 29.31 × 5 =
  30. 30.49 × 5 =
  31. 31.79 × 50 =
  32. 32.66 × 50 =
  33. 33.32 × 50 =
  34. 34.15 × 5 =
  35. 35.21 × 5 =
  36. 36.94 × 50 =
  37. 37.72 × 5 =
  38. 38.46 × 50 =
  39. 39.50 × 50 =
  40. 40.20 × 50 =

Answer key

  1. 2600
  2. 415
  3. 1700
  4. 390
  5. 445
  6. 95
  7. 4150
  8. 4100
  9. 4250
  10. 3350
  11. 170
  12. 170
  13. 310
  14. 1800
  15. 270
  16. 435
  17. 2250
  18. 4750
  19. 600
  20. 2100
  21. 1850
  22. 135
  23. 4700
  24. 335
  25. 255
  26. 220
  27. 210
  28. 600
  29. 155
  30. 245
  31. 3950
  32. 3300
  33. 1600
  34. 75
  35. 105
  36. 4700
  37. 360
  38. 2300
  39. 2500
  40. 1000

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