[5/4-(3/8+1/6-3/4)×24]÷5 =[5/4-(1/6-3/8)×24]÷5 =[5/4-(4/24-9/24)×24]÷5 =(5/4+5/24×24)÷5 =(5/4+5)÷5 =1/4+1 =5/4