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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 413 · 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. 1.35 × 50 =
  2. 2.94 × 50 =
  3. 3.94 × 5 =
  4. 4.36 × 5 =
  5. 5.87 × 50 =
  6. 6.30 × 5 =
  7. 7.70 × 50 =
  8. 8.61 × 50 =
  9. 9.82 × 50 =
  10. 10.97 × 50 =
  11. 11.22 × 5 =
  12. 12.30 × 50 =
  13. 13.75 × 5 =
  14. 14.81 × 50 =
  15. 15.28 × 50 =
  16. 16.87 × 50 =
  17. 17.18 × 5 =
  18. 18.58 × 50 =
  19. 19.29 × 5 =
  20. 20.36 × 5 =
  21. 21.16 × 50 =
  22. 22.68 × 5 =
  23. 23.33 × 50 =
  24. 24.51 × 5 =
  25. 25.41 × 50 =
  26. 26.83 × 50 =
  27. 27.66 × 5 =
  28. 28.61 × 5 =
  29. 29.69 × 5 =
  30. 30.77 × 50 =
  31. 31.98 × 50 =
  32. 32.76 × 5 =
  33. 33.70 × 5 =
  34. 34.27 × 5 =
  35. 35.33 × 50 =
  36. 36.15 × 5 =
  37. 37.37 × 5 =
  38. 38.43 × 5 =
  39. 39.52 × 5 =
  40. 40.93 × 50 =

Answer key

  1. 1750
  2. 4700
  3. 470
  4. 180
  5. 4350
  6. 150
  7. 3500
  8. 3050
  9. 4100
  10. 4850
  11. 110
  12. 1500
  13. 375
  14. 4050
  15. 1400
  16. 4350
  17. 90
  18. 2900
  19. 145
  20. 180
  21. 800
  22. 340
  23. 1650
  24. 255
  25. 2050
  26. 4150
  27. 330
  28. 305
  29. 345
  30. 3850
  31. 4900
  32. 380
  33. 350
  34. 135
  35. 1650
  36. 75
  37. 185
  38. 215
  39. 260
  40. 4650

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