正解写法是:(8-(4+1/3))/(2+4/9)=(8-13/3)/(22/9)=(11/3)*9/22=33/22=3/2=1.5
(8+4又1/3)÷(2又4/9)=111/22
(8-4又1/3)除以2又4/9=3又2/3除以2又4/9=3/2=1.5
这狗+日的百度等于1.5
等于3/2