用简便方法计算:6.9-4.5×0.8-0.4

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 22:53:31
用简便方法计算:6.9-4.5×0.8-0.4

用简便方法计算:6.9-4.5×0.8-0.4
用简便方法计算:6.9-4.5×0.8-0.4

用简便方法计算:6.9-4.5×0.8-0.4
6.9-4.5×0.8-0.4
=6.9-3.6-0.4
=6.9-4
=2.9