а)(12*5)+(12*1/4)=60+(12/1*1/4)=60+(3/1*1/1)=60+3=63
б)(6*7)+(5/7*7)=42+(5/7*7/1)=42+(5/1*1/1)=42+5=47
в)8*(3+9*8/8)=8*75/8=8/1*75/8=1/1*75/1=75
г)(1+6*17/17)*17=103/17*17=103/17*17/1=103/1*1/1=103
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а)(12*5)+(12*1/4)=60+(12/1*1/4)=60+(3/1*1/1)=60+3=63
б)(6*7)+(5/7*7)=42+(5/7*7/1)=42+(5/1*1/1)=42+5=47
в)8*(3+9*8/8)=8*75/8=8/1*75/8=1/1*75/1=75
г)(1+6*17/17)*17=103/17*17=103/17*17/1=103/1*1/1=103