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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 580 · 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. 1.55 × 5 =
  2. 2.19 × 5 =
  3. 3.73 × 5 =
  4. 4.71 × 50 =
  5. 5.23 × 5 =
  6. 6.36 × 50 =
  7. 7.39 × 50 =
  8. 8.84 × 5 =
  9. 9.31 × 50 =
  10. 10.93 × 50 =
  11. 11.73 × 50 =
  12. 12.43 × 50 =
  13. 13.89 × 5 =
  14. 14.21 × 5 =
  15. 15.89 × 5 =
  16. 16.34 × 5 =
  17. 17.20 × 5 =
  18. 18.15 × 5 =
  19. 19.12 × 50 =
  20. 20.33 × 50 =
  21. 21.28 × 5 =
  22. 22.36 × 50 =
  23. 23.14 × 5 =
  24. 24.48 × 5 =
  25. 25.82 × 50 =
  26. 26.72 × 5 =
  27. 27.82 × 50 =
  28. 28.79 × 5 =
  29. 29.31 × 50 =
  30. 30.82 × 5 =
  31. 31.68 × 50 =
  32. 32.66 × 50 =
  33. 33.47 × 5 =
  34. 34.22 × 5 =
  35. 35.83 × 5 =
  36. 36.62 × 50 =
  37. 37.75 × 5 =
  38. 38.95 × 5 =
  39. 39.31 × 5 =
  40. 40.54 × 50 =

Answer key

  1. 275
  2. 95
  3. 365
  4. 3550
  5. 115
  6. 1800
  7. 1950
  8. 420
  9. 1550
  10. 4650
  11. 3650
  12. 2150
  13. 445
  14. 105
  15. 445
  16. 170
  17. 100
  18. 75
  19. 600
  20. 1650
  21. 140
  22. 1800
  23. 70
  24. 240
  25. 4100
  26. 360
  27. 4100
  28. 395
  29. 1550
  30. 410
  31. 3400
  32. 3300
  33. 235
  34. 110
  35. 415
  36. 3100
  37. 375
  38. 475
  39. 155
  40. 2700

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