51.2*33.5+512*6.4+5.12 怎么简便
问题描述:
51.2*33.5+512*6.4+5.12 怎么简便
答
51.2*33.5+512*6.4+5.12
=5.12*335+5.12*640+5.12
=5.12*(335+640+1)
=5.12*976
=4997.12