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Se dau nr:a=298005,B=97 468,c=158143,d=979
Sa se calculeze ;a+B-(c+d)=,a-[d+(c-d)]=,d+[a-(B+c)] dau coroana


Răspuns :

298005+97468-(158143+979=298005-[979+(158143-979)]=979+[298005-(97468+158143)]