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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 759 · 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. 1.45 × 5 =
  2. 2.51 × 5 =
  3. 3.70 × 5 =
  4. 4.36 × 5 =
  5. 5.91 × 50 =
  6. 6.53 × 5 =
  7. 7.12 × 5 =
  8. 8.64 × 50 =
  9. 9.94 × 50 =
  10. 10.43 × 5 =
  11. 11.84 × 5 =
  12. 12.12 × 5 =
  13. 13.30 × 50 =
  14. 14.68 × 50 =
  15. 15.77 × 50 =
  16. 16.30 × 5 =
  17. 17.63 × 5 =
  18. 18.18 × 50 =
  19. 19.51 × 50 =
  20. 20.38 × 5 =
  21. 21.70 × 5 =
  22. 22.81 × 5 =
  23. 23.21 × 5 =
  24. 24.34 × 50 =
  25. 25.46 × 50 =
  26. 26.81 × 5 =
  27. 27.67 × 5 =
  28. 28.93 × 50 =
  29. 29.77 × 50 =
  30. 30.66 × 50 =
  31. 31.34 × 50 =
  32. 32.34 × 5 =
  33. 33.21 × 5 =
  34. 34.74 × 5 =
  35. 35.37 × 50 =
  36. 36.37 × 50 =
  37. 37.17 × 50 =
  38. 38.26 × 50 =
  39. 39.83 × 5 =
  40. 40.69 × 5 =

Answer key

  1. 225
  2. 255
  3. 350
  4. 180
  5. 4550
  6. 265
  7. 60
  8. 3200
  9. 4700
  10. 215
  11. 420
  12. 60
  13. 1500
  14. 3400
  15. 3850
  16. 150
  17. 315
  18. 900
  19. 2550
  20. 190
  21. 350
  22. 405
  23. 105
  24. 1700
  25. 2300
  26. 405
  27. 335
  28. 4650
  29. 3850
  30. 3300
  31. 1700
  32. 170
  33. 105
  34. 370
  35. 1850
  36. 1850
  37. 850
  38. 1300
  39. 415
  40. 345

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