(1)=0.125*(0.75+8.25+1) =0.125*10 =1.25(2)=213/14+4+0.25-5-0.75 =213/14-1-0.5 =213/14-1.5 =213/14-21/14 =192/14(3)=7+5/6+8.9+6.1+2+1/6 =9+1+15 =25
1/8(3/4+8.25+1)