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Calculeaza: (9/2+5/2-1)-(1/4+3/4+5)=

Răspuns :

(4,5+2,5-1)-(0,25+0,75+5)=6-6=0
(14/2-1)-(4/4+5)=
14/2=7 (14:2)
4/4=1 (adica 4:4)
(7-1)-(1+5)=
6-6=0