4分之3÷【5分之3+5分之2×(1-8分之3)]

问题描述:

4分之3÷【5分之3+5分之2×(1-8分之3)]

(3/4)÷[3/5+2/5×(1-3/8)] =(3/4)÷(3/5+1/4) =5/4+3 =17/4