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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 815 · 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 × 5 =
  2. 2.82 × 50 =
  3. 3.24 × 5 =
  4. 4.59 × 50 =
  5. 5.51 × 5 =
  6. 6.16 × 5 =
  7. 7.51 × 50 =
  8. 8.17 × 5 =
  9. 9.81 × 50 =
  10. 10.57 × 5 =
  11. 11.12 × 50 =
  12. 12.69 × 50 =
  13. 13.31 × 50 =
  14. 14.48 × 5 =
  15. 15.83 × 5 =
  16. 16.24 × 5 =
  17. 17.21 × 50 =
  18. 18.97 × 50 =
  19. 19.98 × 5 =
  20. 20.78 × 5 =
  21. 21.86 × 5 =
  22. 22.24 × 5 =
  23. 23.95 × 50 =
  24. 24.70 × 50 =
  25. 25.89 × 50 =
  26. 26.28 × 5 =
  27. 27.48 × 5 =
  28. 28.92 × 50 =
  29. 29.30 × 5 =
  30. 30.37 × 50 =
  31. 31.90 × 5 =
  32. 32.15 × 5 =
  33. 33.71 × 50 =
  34. 34.15 × 50 =
  35. 35.85 × 5 =
  36. 36.70 × 5 =
  37. 37.92 × 5 =
  38. 38.69 × 50 =
  39. 39.57 × 5 =
  40. 40.23 × 50 =

Answer key

  1. 490
  2. 4100
  3. 120
  4. 2950
  5. 255
  6. 80
  7. 2550
  8. 85
  9. 4050
  10. 285
  11. 600
  12. 3450
  13. 1550
  14. 240
  15. 415
  16. 120
  17. 1050
  18. 4850
  19. 490
  20. 390
  21. 430
  22. 120
  23. 4750
  24. 3500
  25. 4450
  26. 140
  27. 240
  28. 4600
  29. 150
  30. 1850
  31. 450
  32. 75
  33. 3550
  34. 750
  35. 425
  36. 350
  37. 460
  38. 3450
  39. 285
  40. 1150

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