4*4/4-4/4 4/4/4/4/4=1 4-(4+4)/(4+4) 4/4/4+4-4 =16/4-1 =4-8/8 =1+4-4(加一个4减一个4等于 =4-1 =4-1 =1 没加没减) =3 =3
满意请采纳