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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 821 · 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. 1.71 × 50 =
  2. 2.44 × 50 =
  3. 3.75 × 50 =
  4. 4.16 × 5 =
  5. 5.95 × 50 =
  6. 6.33 × 50 =
  7. 7.31 × 5 =
  8. 8.24 × 50 =
  9. 9.64 × 5 =
  10. 10.39 × 50 =
  11. 11.67 × 5 =
  12. 12.27 × 5 =
  13. 13.17 × 5 =
  14. 14.98 × 50 =
  15. 15.69 × 5 =
  16. 16.55 × 5 =
  17. 17.16 × 5 =
  18. 18.94 × 5 =
  19. 19.76 × 5 =
  20. 20.31 × 5 =
  21. 21.17 × 5 =
  22. 22.45 × 5 =
  23. 23.64 × 5 =
  24. 24.93 × 5 =
  25. 25.31 × 5 =
  26. 26.82 × 50 =
  27. 27.28 × 5 =
  28. 28.25 × 5 =
  29. 29.72 × 50 =
  30. 30.60 × 5 =
  31. 31.83 × 5 =
  32. 32.20 × 50 =
  33. 33.67 × 50 =
  34. 34.48 × 50 =
  35. 35.67 × 5 =
  36. 36.95 × 5 =
  37. 37.37 × 5 =
  38. 38.91 × 50 =
  39. 39.38 × 5 =
  40. 40.55 × 50 =

Answer key

  1. 3550
  2. 2200
  3. 3750
  4. 80
  5. 4750
  6. 1650
  7. 155
  8. 1200
  9. 320
  10. 1950
  11. 335
  12. 135
  13. 85
  14. 4900
  15. 345
  16. 275
  17. 80
  18. 470
  19. 380
  20. 155
  21. 85
  22. 225
  23. 320
  24. 465
  25. 155
  26. 4100
  27. 140
  28. 125
  29. 3600
  30. 300
  31. 415
  32. 1000
  33. 3350
  34. 2400
  35. 335
  36. 475
  37. 185
  38. 4550
  39. 190
  40. 2750

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