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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 53 · 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. 1.15 × 5 =
  2. 2.71 × 50 =
  3. 3.52 × 5 =
  4. 4.33 × 5 =
  5. 5.22 × 5 =
  6. 6.81 × 50 =
  7. 7.13 × 5 =
  8. 8.25 × 5 =
  9. 9.37 × 5 =
  10. 10.63 × 5 =
  11. 11.85 × 50 =
  12. 12.21 × 50 =
  13. 13.22 × 5 =
  14. 14.38 × 5 =
  15. 15.97 × 50 =
  16. 16.50 × 50 =
  17. 17.28 × 5 =
  18. 18.29 × 50 =
  19. 19.83 × 5 =
  20. 20.49 × 5 =
  21. 21.28 × 5 =
  22. 22.48 × 50 =
  23. 23.74 × 50 =
  24. 24.37 × 50 =
  25. 25.90 × 5 =
  26. 26.23 × 50 =
  27. 27.77 × 50 =
  28. 28.52 × 5 =
  29. 29.70 × 5 =
  30. 30.53 × 50 =
  31. 31.36 × 5 =
  32. 32.13 × 5 =
  33. 33.21 × 5 =
  34. 34.57 × 5 =
  35. 35.53 × 5 =
  36. 36.88 × 50 =
  37. 37.37 × 50 =
  38. 38.85 × 5 =
  39. 39.55 × 50 =
  40. 40.84 × 50 =

Answer key

  1. 75
  2. 3550
  3. 260
  4. 165
  5. 110
  6. 4050
  7. 65
  8. 125
  9. 185
  10. 315
  11. 4250
  12. 1050
  13. 110
  14. 190
  15. 4850
  16. 2500
  17. 140
  18. 1450
  19. 415
  20. 245
  21. 140
  22. 2400
  23. 3700
  24. 1850
  25. 450
  26. 1150
  27. 3850
  28. 260
  29. 350
  30. 2650
  31. 180
  32. 65
  33. 105
  34. 285
  35. 265
  36. 4400
  37. 1850
  38. 425
  39. 2750
  40. 4200

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