5-9/4÷45/8-3/5简便算法
问题描述:
5-9/4÷45/8-3/5简便算法
答
5-9/4÷45/8-3/5
=5-9/4×8/45-3/5
=5-2/5-3/5
=5-(2/5+3/5)
=5-1
=4