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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 389 · 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. 1.58 × 50 =
  2. 2.51 × 5 =
  3. 3.31 × 5 =
  4. 4.41 × 5 =
  5. 5.38 × 50 =
  6. 6.38 × 50 =
  7. 7.49 × 5 =
  8. 8.61 × 5 =
  9. 9.91 × 5 =
  10. 10.75 × 5 =
  11. 11.20 × 5 =
  12. 12.83 × 5 =
  13. 13.36 × 50 =
  14. 14.35 × 50 =
  15. 15.29 × 5 =
  16. 16.92 × 50 =
  17. 17.88 × 5 =
  18. 18.85 × 50 =
  19. 19.88 × 5 =
  20. 20.69 × 5 =
  21. 21.46 × 50 =
  22. 22.24 × 5 =
  23. 23.85 × 50 =
  24. 24.83 × 5 =
  25. 25.92 × 5 =
  26. 26.86 × 50 =
  27. 27.34 × 50 =
  28. 28.12 × 5 =
  29. 29.63 × 50 =
  30. 30.43 × 5 =
  31. 31.98 × 5 =
  32. 32.22 × 5 =
  33. 33.20 × 5 =
  34. 34.81 × 50 =
  35. 35.39 × 50 =
  36. 36.23 × 5 =
  37. 37.29 × 50 =
  38. 38.68 × 5 =
  39. 39.49 × 5 =
  40. 40.49 × 5 =

Answer key

  1. 2900
  2. 255
  3. 155
  4. 205
  5. 1900
  6. 1900
  7. 245
  8. 305
  9. 455
  10. 375
  11. 100
  12. 415
  13. 1800
  14. 1750
  15. 145
  16. 4600
  17. 440
  18. 4250
  19. 440
  20. 345
  21. 2300
  22. 120
  23. 4250
  24. 415
  25. 460
  26. 4300
  27. 1700
  28. 60
  29. 3150
  30. 215
  31. 490
  32. 110
  33. 100
  34. 4050
  35. 1950
  36. 115
  37. 1450
  38. 340
  39. 245
  40. 245

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