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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 706 · 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. 1.21 × 5 =
  2. 2.21 × 5 =
  3. 3.47 × 50 =
  4. 4.26 × 50 =
  5. 5.79 × 5 =
  6. 6.92 × 50 =
  7. 7.74 × 50 =
  8. 8.57 × 50 =
  9. 9.16 × 50 =
  10. 10.35 × 50 =
  11. 11.57 × 50 =
  12. 12.63 × 5 =
  13. 13.65 × 5 =
  14. 14.43 × 5 =
  15. 15.55 × 5 =
  16. 16.74 × 50 =
  17. 17.29 × 5 =
  18. 18.42 × 5 =
  19. 19.18 × 5 =
  20. 20.57 × 5 =
  21. 21.30 × 5 =
  22. 22.25 × 5 =
  23. 23.32 × 50 =
  24. 24.60 × 5 =
  25. 25.83 × 5 =
  26. 26.55 × 50 =
  27. 27.94 × 50 =
  28. 28.31 × 50 =
  29. 29.14 × 5 =
  30. 30.17 × 50 =
  31. 31.89 × 50 =
  32. 32.25 × 50 =
  33. 33.37 × 50 =
  34. 34.32 × 50 =
  35. 35.13 × 5 =
  36. 36.25 × 5 =
  37. 37.44 × 50 =
  38. 38.26 × 50 =
  39. 39.63 × 5 =
  40. 40.69 × 5 =

Answer key

  1. 105
  2. 105
  3. 2350
  4. 1300
  5. 395
  6. 4600
  7. 3700
  8. 2850
  9. 800
  10. 1750
  11. 2850
  12. 315
  13. 325
  14. 215
  15. 275
  16. 3700
  17. 145
  18. 210
  19. 90
  20. 285
  21. 150
  22. 125
  23. 1600
  24. 300
  25. 415
  26. 2750
  27. 4700
  28. 1550
  29. 70
  30. 850
  31. 4450
  32. 1250
  33. 1850
  34. 1600
  35. 65
  36. 125
  37. 2200
  38. 1300
  39. 315
  40. 345

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