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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 913 · 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. 1.14 × 50 =
  2. 2.50 × 5 =
  3. 3.46 × 5 =
  4. 4.25 × 5 =
  5. 5.51 × 5 =
  6. 6.72 × 5 =
  7. 7.66 × 50 =
  8. 8.91 × 5 =
  9. 9.75 × 50 =
  10. 10.67 × 50 =
  11. 11.90 × 50 =
  12. 12.40 × 5 =
  13. 13.49 × 5 =
  14. 14.47 × 50 =
  15. 15.83 × 5 =
  16. 16.33 × 5 =
  17. 17.21 × 50 =
  18. 18.42 × 5 =
  19. 19.72 × 50 =
  20. 20.15 × 5 =
  21. 21.94 × 50 =
  22. 22.81 × 5 =
  23. 23.38 × 5 =
  24. 24.83 × 5 =
  25. 25.27 × 5 =
  26. 26.58 × 5 =
  27. 27.76 × 5 =
  28. 28.14 × 5 =
  29. 29.54 × 50 =
  30. 30.57 × 5 =
  31. 31.49 × 50 =
  32. 32.53 × 5 =
  33. 33.24 × 5 =
  34. 34.59 × 50 =
  35. 35.93 × 50 =
  36. 36.61 × 5 =
  37. 37.87 × 50 =
  38. 38.16 × 5 =
  39. 39.41 × 5 =
  40. 40.81 × 5 =

Answer key

  1. 700
  2. 250
  3. 230
  4. 125
  5. 255
  6. 360
  7. 3300
  8. 455
  9. 3750
  10. 3350
  11. 4500
  12. 200
  13. 245
  14. 2350
  15. 415
  16. 165
  17. 1050
  18. 210
  19. 3600
  20. 75
  21. 4700
  22. 405
  23. 190
  24. 415
  25. 135
  26. 290
  27. 380
  28. 70
  29. 2700
  30. 285
  31. 2450
  32. 265
  33. 120
  34. 2950
  35. 4650
  36. 305
  37. 4350
  38. 80
  39. 205
  40. 405

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