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K) 9x(101x1+111:1)-[85-7x(36:9+63:9)]=

Răspuns :

9×(101×1+111÷1)-([85-7×(36÷9+63÷9)]=
9×(101+111)-[85-7×(4+7)]=
9×212-(85-7×11)=
1908-(85-77)=
1908-8=
1900