54.38-(19.5+4.38) 简便

来源:学生作业学帮网 编辑:学帮网 时间:2024/07/04 08:01:01

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