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Maria1096
a fost răspuns

efectuati(7/3-7/4)-12/13; (5/6+7/6)-1/7; 4/3-(9/11+2/11)

Răspuns :

1) (7/3-7/4)-12/13=7/12-12/13=-53/156
2) (5/6+7/6)-1/7=2-1/7=13/7
3) 4/3-(9/11+2/11)=4/3-1=1/3

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