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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 342 · 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. 1.98 × 50 =
  2. 2.30 × 50 =
  3. 3.83 × 50 =
  4. 4.50 × 5 =
  5. 5.76 × 50 =
  6. 6.78 × 50 =
  7. 7.67 × 50 =
  8. 8.22 × 5 =
  9. 9.70 × 50 =
  10. 10.43 × 50 =
  11. 11.71 × 50 =
  12. 12.48 × 50 =
  13. 13.91 × 5 =
  14. 14.23 × 5 =
  15. 15.94 × 50 =
  16. 16.22 × 50 =
  17. 17.51 × 50 =
  18. 18.41 × 50 =
  19. 19.55 × 5 =
  20. 20.59 × 5 =
  21. 21.13 × 50 =
  22. 22.47 × 5 =
  23. 23.12 × 5 =
  24. 24.69 × 5 =
  25. 25.76 × 5 =
  26. 26.28 × 5 =
  27. 27.18 × 5 =
  28. 28.69 × 5 =
  29. 29.50 × 5 =
  30. 30.67 × 5 =
  31. 31.23 × 50 =
  32. 32.42 × 5 =
  33. 33.30 × 5 =
  34. 34.85 × 5 =
  35. 35.90 × 5 =
  36. 36.58 × 50 =
  37. 37.97 × 50 =
  38. 38.55 × 5 =
  39. 39.55 × 5 =
  40. 40.47 × 5 =

Answer key

  1. 4900
  2. 1500
  3. 4150
  4. 250
  5. 3800
  6. 3900
  7. 3350
  8. 110
  9. 3500
  10. 2150
  11. 3550
  12. 2400
  13. 455
  14. 115
  15. 4700
  16. 1100
  17. 2550
  18. 2050
  19. 275
  20. 295
  21. 650
  22. 235
  23. 60
  24. 345
  25. 380
  26. 140
  27. 90
  28. 345
  29. 250
  30. 335
  31. 1150
  32. 210
  33. 150
  34. 425
  35. 450
  36. 2900
  37. 4850
  38. 275
  39. 275
  40. 235

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