52.91-(13*31+11)/13-(18*3+2)/3(数学)
问题描述:
52.91-(13*31+11)/13-(18*3+2)/3(数学)
简算,要过程,急!
答
52.91-(13*31+11)/13-(18*3+2)/3
=52.91-31-11/13-18-2/3
=3+91/100-1-20/39
=2+(91*39-2000)/3900
=2又1549/3900
除了第一步,没有简算了啊