几年级的题啊?快把我算晕了~哪位老师教教我算?

1个回答

（8.4÷五分之六-三分之八）x四分之三 =(8.4÷6/5-8/3)x3/4=7x3/4-8/3x3/4 =21/4-2=17/4｛五分之十三+2.4x（三分之五）-1.5｝÷1.1={13/5+2.4x5/3-1.5}÷1.1={13/5+4-1.5}÷1.1={13/5+2.5}÷1.1=5.1÷1.1=51/11七分...