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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 571 · 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. 1.32 × 5 =
  2. 2.86 × 5 =
  3. 3.63 × 5 =
  4. 4.69 × 5 =
  5. 5.16 × 5 =
  6. 6.65 × 50 =
  7. 7.56 × 50 =
  8. 8.36 × 5 =
  9. 9.28 × 5 =
  10. 10.89 × 50 =
  11. 11.40 × 50 =
  12. 12.79 × 50 =
  13. 13.17 × 5 =
  14. 14.45 × 5 =
  15. 15.64 × 50 =
  16. 16.83 × 5 =
  17. 17.89 × 50 =
  18. 18.62 × 5 =
  19. 19.22 × 50 =
  20. 20.24 × 50 =
  21. 21.81 × 50 =
  22. 22.34 × 50 =
  23. 23.13 × 50 =
  24. 24.82 × 5 =
  25. 25.37 × 5 =
  26. 26.41 × 50 =
  27. 27.66 × 5 =
  28. 28.54 × 5 =
  29. 29.16 × 50 =
  30. 30.81 × 50 =
  31. 31.79 × 50 =
  32. 32.40 × 50 =
  33. 33.23 × 50 =
  34. 34.63 × 5 =
  35. 35.66 × 50 =
  36. 36.43 × 5 =
  37. 37.37 × 50 =
  38. 38.45 × 50 =
  39. 39.88 × 5 =
  40. 40.75 × 5 =

Answer key

  1. 160
  2. 430
  3. 315
  4. 345
  5. 80
  6. 3250
  7. 2800
  8. 180
  9. 140
  10. 4450
  11. 2000
  12. 3950
  13. 85
  14. 225
  15. 3200
  16. 415
  17. 4450
  18. 310
  19. 1100
  20. 1200
  21. 4050
  22. 1700
  23. 650
  24. 410
  25. 185
  26. 2050
  27. 330
  28. 270
  29. 800
  30. 4050
  31. 3950
  32. 2000
  33. 1150
  34. 315
  35. 3300
  36. 215
  37. 1850
  38. 2250
  39. 440
  40. 375

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