【(21/4-4.25)*5/8】/3/8+3.3/11/6

问题描述:

【(21/4-4.25)*5/8】/3/8+3.3/11/6

【(21/4-4.25)*5/8】/3/8+3.3/11/6
=【1*5/8】/3/8+3.3*6/11
=5/8*8/3+3.3*6/11
=5/3+9/5
=52/15