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efectueaza adunarile prin prezentarea fractiilor pe un segment de dreapta:5supra 9 +2supra 9

Răspuns :

/*****/*****/*****/*****/*****/_____/_____/_____/_____/ 5/9
/*****/*****/_____/_____/_____/_____/_____/_____/ 2/5
5/9+2/9=7/9
/*****/*****/*****/*****/*****/*****/*****/_____/_____/ 7/9