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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 861 · 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. 1.93 × 50 =
  2. 2.41 × 50 =
  3. 3.24 × 50 =
  4. 4.67 × 50 =
  5. 5.29 × 50 =
  6. 6.68 × 50 =
  7. 7.15 × 50 =
  8. 8.40 × 50 =
  9. 9.84 × 5 =
  10. 10.41 × 50 =
  11. 11.84 × 5 =
  12. 12.81 × 50 =
  13. 13.89 × 50 =
  14. 14.90 × 5 =
  15. 15.81 × 50 =
  16. 16.21 × 50 =
  17. 17.79 × 5 =
  18. 18.13 × 5 =
  19. 19.12 × 5 =
  20. 20.78 × 5 =
  21. 21.79 × 50 =
  22. 22.69 × 5 =
  23. 23.35 × 5 =
  24. 24.49 × 5 =
  25. 25.15 × 5 =
  26. 26.37 × 5 =
  27. 27.40 × 50 =
  28. 28.28 × 50 =
  29. 29.86 × 50 =
  30. 30.33 × 50 =
  31. 31.62 × 50 =
  32. 32.59 × 5 =
  33. 33.21 × 5 =
  34. 34.95 × 50 =
  35. 35.90 × 5 =
  36. 36.42 × 5 =
  37. 37.24 × 50 =
  38. 38.18 × 50 =
  39. 39.60 × 50 =
  40. 40.42 × 5 =

Answer key

  1. 4650
  2. 2050
  3. 1200
  4. 3350
  5. 1450
  6. 3400
  7. 750
  8. 2000
  9. 420
  10. 2050
  11. 420
  12. 4050
  13. 4450
  14. 450
  15. 4050
  16. 1050
  17. 395
  18. 65
  19. 60
  20. 390
  21. 3950
  22. 345
  23. 175
  24. 245
  25. 75
  26. 185
  27. 2000
  28. 1400
  29. 4300
  30. 1650
  31. 3100
  32. 295
  33. 105
  34. 4750
  35. 450
  36. 210
  37. 1200
  38. 900
  39. 3000
  40. 210

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