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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 990 · 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. 1.91 × 5 =
  2. 2.89 × 50 =
  3. 3.58 × 5 =
  4. 4.41 × 5 =
  5. 5.15 × 50 =
  6. 6.88 × 50 =
  7. 7.80 × 5 =
  8. 8.73 × 50 =
  9. 9.85 × 5 =
  10. 10.68 × 50 =
  11. 11.31 × 5 =
  12. 12.57 × 50 =
  13. 13.85 × 5 =
  14. 14.77 × 50 =
  15. 15.37 × 5 =
  16. 16.41 × 50 =
  17. 17.46 × 5 =
  18. 18.80 × 5 =
  19. 19.82 × 50 =
  20. 20.21 × 50 =
  21. 21.15 × 50 =
  22. 22.36 × 50 =
  23. 23.14 × 5 =
  24. 24.92 × 5 =
  25. 25.19 × 50 =
  26. 26.42 × 50 =
  27. 27.84 × 5 =
  28. 28.24 × 50 =
  29. 29.61 × 5 =
  30. 30.71 × 5 =
  31. 31.97 × 50 =
  32. 32.23 × 50 =
  33. 33.83 × 5 =
  34. 34.37 × 5 =
  35. 35.54 × 50 =
  36. 36.38 × 50 =
  37. 37.35 × 5 =
  38. 38.13 × 5 =
  39. 39.84 × 50 =
  40. 40.26 × 5 =

Answer key

  1. 455
  2. 4450
  3. 290
  4. 205
  5. 750
  6. 4400
  7. 400
  8. 3650
  9. 425
  10. 3400
  11. 155
  12. 2850
  13. 425
  14. 3850
  15. 185
  16. 2050
  17. 230
  18. 400
  19. 4100
  20. 1050
  21. 750
  22. 1800
  23. 70
  24. 460
  25. 950
  26. 2100
  27. 420
  28. 1200
  29. 305
  30. 355
  31. 4850
  32. 1150
  33. 415
  34. 185
  35. 2700
  36. 1900
  37. 175
  38. 65
  39. 4200
  40. 130

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