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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 731 · 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. 1.46 × 5 =
  2. 2.58 × 5 =
  3. 3.29 × 5 =
  4. 4.44 × 5 =
  5. 5.28 × 50 =
  6. 6.32 × 50 =
  7. 7.78 × 50 =
  8. 8.29 × 50 =
  9. 9.43 × 50 =
  10. 10.16 × 50 =
  11. 11.86 × 50 =
  12. 12.59 × 50 =
  13. 13.34 × 50 =
  14. 14.83 × 5 =
  15. 15.70 × 5 =
  16. 16.83 × 5 =
  17. 17.57 × 50 =
  18. 18.70 × 5 =
  19. 19.97 × 5 =
  20. 20.19 × 50 =
  21. 21.54 × 50 =
  22. 22.60 × 5 =
  23. 23.49 × 5 =
  24. 24.34 × 5 =
  25. 25.21 × 50 =
  26. 26.73 × 5 =
  27. 27.26 × 50 =
  28. 28.54 × 50 =
  29. 29.74 × 50 =
  30. 30.42 × 5 =
  31. 31.56 × 50 =
  32. 32.55 × 5 =
  33. 33.77 × 50 =
  34. 34.30 × 5 =
  35. 35.59 × 50 =
  36. 36.96 × 5 =
  37. 37.96 × 50 =
  38. 38.20 × 5 =
  39. 39.36 × 5 =
  40. 40.29 × 50 =

Answer key

  1. 230
  2. 290
  3. 145
  4. 220
  5. 1400
  6. 1600
  7. 3900
  8. 1450
  9. 2150
  10. 800
  11. 4300
  12. 2950
  13. 1700
  14. 415
  15. 350
  16. 415
  17. 2850
  18. 350
  19. 485
  20. 950
  21. 2700
  22. 300
  23. 245
  24. 170
  25. 1050
  26. 365
  27. 1300
  28. 2700
  29. 3700
  30. 210
  31. 2800
  32. 275
  33. 3850
  34. 150
  35. 2950
  36. 480
  37. 4800
  38. 100
  39. 180
  40. 1450

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