【4分之3-0÷【7分之1+13分之2】】×1又4分之1
=(3/4-0)×5/4
=3/4×5/4
=15/16
【2-【11.9-8.4×1又3分之1】】÷1.3
=[2-(11.9-8.4×4/3)]÷1.3
=[2-(11.9-11.2)]÷1.3
=(2-0.7)÷1.3
=1.3÷1.3
=1