(20×5-82)÷(5+1)=(100-82)÷6=18÷6=3(磨宽道)答对的题:20-3=17(道)饥和答:他答对了17道题.瞎肢亮故选:C.
答错:(20×5-82)÷(5+1)=3道答对:20-3=17道
答对17题答错3题