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Ordinea efectuarii operatiilor si folosirea parantezelor rotunde Se dau numerele: a=9,b=63:9,c=5x5. Afla: (c+c)x9-7; 10c-9b+(c+axb).

Răspuns :

(c+c)x9-7=(5x5+5x5)x9-7=(25+25)x9-7=
50x9-7=450-7=443

10c-9b+(c+axb)=
10x5x5-9x63:9+(5x5+9x63:9)=
250-567:9+(25+567:9)=
250-63+(25+63)=
187+88=275