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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 909 · 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. 1.42 × 50 =
  2. 2.78 × 50 =
  3. 3.48 × 5 =
  4. 4.92 × 5 =
  5. 5.21 × 5 =
  6. 6.64 × 50 =
  7. 7.77 × 50 =
  8. 8.64 × 5 =
  9. 9.23 × 5 =
  10. 10.79 × 5 =
  11. 11.53 × 5 =
  12. 12.16 × 50 =
  13. 13.93 × 5 =
  14. 14.85 × 5 =
  15. 15.86 × 50 =
  16. 16.56 × 5 =
  17. 17.25 × 5 =
  18. 18.61 × 50 =
  19. 19.48 × 5 =
  20. 20.79 × 5 =
  21. 21.72 × 50 =
  22. 22.46 × 50 =
  23. 23.28 × 50 =
  24. 24.49 × 50 =
  25. 25.54 × 5 =
  26. 26.30 × 5 =
  27. 27.18 × 50 =
  28. 28.53 × 50 =
  29. 29.14 × 50 =
  30. 30.13 × 5 =
  31. 31.53 × 5 =
  32. 32.98 × 5 =
  33. 33.19 × 50 =
  34. 34.60 × 5 =
  35. 35.62 × 5 =
  36. 36.14 × 50 =
  37. 37.52 × 50 =
  38. 38.81 × 5 =
  39. 39.54 × 5 =
  40. 40.49 × 5 =

Answer key

  1. 2100
  2. 3900
  3. 240
  4. 460
  5. 105
  6. 3200
  7. 3850
  8. 320
  9. 115
  10. 395
  11. 265
  12. 800
  13. 465
  14. 425
  15. 4300
  16. 280
  17. 125
  18. 3050
  19. 240
  20. 395
  21. 3600
  22. 2300
  23. 1400
  24. 2450
  25. 270
  26. 150
  27. 900
  28. 2650
  29. 700
  30. 65
  31. 265
  32. 490
  33. 950
  34. 300
  35. 310
  36. 700
  37. 2600
  38. 405
  39. 270
  40. 245

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