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Aproximar a la decena 2 cifras

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Aproximar a la decena 2 cifras

  1. 1. Cálculo mental 2 cifras Aproximación a las decenas
  2. 2. 4 Está entre el 40 y el 50 40 41 43 44 45 46 47 48 49 50 2 42 2 Acaba en 2 Se aproxima a 50
  3. 3. Si acaba en 0, 1, 2, 3, 4 o 5 se aproxima a la decena más baja. 42 acaba en 2, se aproxima a 40 Si acaba en 6, 7, 8, 9 o 0 se aproxima a la decena más alta 48 acaba en 8, se aproxima a 50
  4. 4. 39
  5. 5. 12
  6. 6. 48
  7. 7. 89
  8. 8. 25
  9. 9. 41
  10. 10. 63
  11. 11. 47
  12. 12. 49
  13. 13. 65
  14. 14. 31
  15. 15. 15
  16. 16. 69
  17. 17. 51
  18. 18. 24
  19. 19. 26
  20. 20. 31
  21. 21. 37
  22. 22. 91
  23. 23. 26
  24. 24. 23
  25. 25. 18
  26. 26. 76
  27. 27. 46
  28. 28. 62

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