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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 987 · 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. 1.70 × 50 =
  2. 2.26 × 5 =
  3. 3.14 × 5 =
  4. 4.14 × 50 =
  5. 5.77 × 50 =
  6. 6.80 × 5 =
  7. 7.24 × 50 =
  8. 8.66 × 5 =
  9. 9.70 × 5 =
  10. 10.85 × 5 =
  11. 11.19 × 50 =
  12. 12.53 × 5 =
  13. 13.12 × 5 =
  14. 14.87 × 50 =
  15. 15.37 × 50 =
  16. 16.57 × 50 =
  17. 17.52 × 50 =
  18. 18.43 × 50 =
  19. 19.68 × 5 =
  20. 20.61 × 50 =
  21. 21.98 × 5 =
  22. 22.31 × 50 =
  23. 23.16 × 5 =
  24. 24.24 × 5 =
  25. 25.67 × 5 =
  26. 26.92 × 5 =
  27. 27.81 × 50 =
  28. 28.35 × 5 =
  29. 29.70 × 5 =
  30. 30.46 × 50 =
  31. 31.83 × 5 =
  32. 32.27 × 50 =
  33. 33.82 × 5 =
  34. 34.94 × 5 =
  35. 35.18 × 5 =
  36. 36.29 × 50 =
  37. 37.15 × 5 =
  38. 38.92 × 50 =
  39. 39.62 × 50 =
  40. 40.73 × 50 =

Answer key

  1. 3500
  2. 130
  3. 70
  4. 700
  5. 3850
  6. 400
  7. 1200
  8. 330
  9. 350
  10. 425
  11. 950
  12. 265
  13. 60
  14. 4350
  15. 1850
  16. 2850
  17. 2600
  18. 2150
  19. 340
  20. 3050
  21. 490
  22. 1550
  23. 80
  24. 120
  25. 335
  26. 460
  27. 4050
  28. 175
  29. 350
  30. 2300
  31. 415
  32. 1350
  33. 410
  34. 470
  35. 90
  36. 1450
  37. 75
  38. 4600
  39. 3100
  40. 3650

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