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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 908 · 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. 1.81 × 50 =
  2. 2.22 × 50 =
  3. 3.57 × 50 =
  4. 4.56 × 5 =
  5. 5.65 × 50 =
  6. 6.30 × 50 =
  7. 7.78 × 50 =
  8. 8.35 × 5 =
  9. 9.79 × 5 =
  10. 10.74 × 50 =
  11. 11.22 × 5 =
  12. 12.98 × 50 =
  13. 13.44 × 50 =
  14. 14.96 × 50 =
  15. 15.59 × 50 =
  16. 16.15 × 50 =
  17. 17.25 × 5 =
  18. 18.37 × 5 =
  19. 19.86 × 5 =
  20. 20.92 × 5 =
  21. 21.89 × 5 =
  22. 22.51 × 5 =
  23. 23.79 × 5 =
  24. 24.84 × 5 =
  25. 25.94 × 5 =
  26. 26.18 × 5 =
  27. 27.44 × 50 =
  28. 28.21 × 50 =
  29. 29.12 × 50 =
  30. 30.95 × 5 =
  31. 31.50 × 5 =
  32. 32.46 × 5 =
  33. 33.30 × 50 =
  34. 34.97 × 5 =
  35. 35.92 × 5 =
  36. 36.25 × 50 =
  37. 37.27 × 5 =
  38. 38.57 × 50 =
  39. 39.28 × 50 =
  40. 40.78 × 5 =

Answer key

  1. 4050
  2. 1100
  3. 2850
  4. 280
  5. 3250
  6. 1500
  7. 3900
  8. 175
  9. 395
  10. 3700
  11. 110
  12. 4900
  13. 2200
  14. 4800
  15. 2950
  16. 750
  17. 125
  18. 185
  19. 430
  20. 460
  21. 445
  22. 255
  23. 395
  24. 420
  25. 470
  26. 90
  27. 2200
  28. 1050
  29. 600
  30. 475
  31. 250
  32. 230
  33. 1500
  34. 485
  35. 460
  36. 1250
  37. 135
  38. 2850
  39. 1400
  40. 390

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