54.38-(19.5+4.38) 简便
来源：学生作业帮助网 编辑：六六作业网 时间：2025/01/11 03:30:07
54.38-(19.5+4.38)简便54.38-(19.5+4.38)简便54.38-(19.5+4.38)简便54.38-(19.5+4.38)=54.38-19.5-4.38=(54.38-4.
54.38-(19.5+4.38) 简便
54.38-(19.5+4.38) 简便
54.38-(19.5+4.38) 简便
54.38-(19.5+4.38)
=54.38-19.5-4.38
=(54.38-4.38)-19.5
=50-19.5
=30.5
54.38-(19.5+4.38)
=54.38-4.38-19.5
=50-19.5
=30.5
54.38-(19.5+4.38)
=54.38-4.38-19.5
=50-19.5
=30.5
=54.38-4.38-19.5
=50-19.5
=30.5