54.2-9分之2-4.8-9分之16 简便算法怎么算?
问题描述:
54.2-9分之2-4.8-9分之16 简便算法怎么算?
答
54.2-9分之2-4.8-9分之16
=54.2-4.8-(9分之2+9分之16)
=54.2-4.8-2
=51.4