简便运算7.5*83-2.5*9
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 05:36:10
![简便运算7.5*83-2.5*9](/uploads/image/z/3854387-11-7.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%977.5%2A83-2.5%2A9)
简便运算7.5*83-2.5*9
简便运算7.5*83-2.5*9
简便运算7.5*83-2.5*9
7.5*83-2.5*9
=7.5*83-7.5*3
=7.5*(83-3)
=7.5*80
=600
7.5*83-2.5*9
=2.5*3*83-2.5*9
=2.5*(3*83-9)
=2.5*(249-9)
=2.5*240
=600
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 05:36:10
简便运算7.5*83-2.5*9
简便运算7.5*83-2.5*9
简便运算7.5*83-2.5*9
7.5*83-2.5*9
=7.5*83-7.5*3
=7.5*(83-3)
=7.5*80
=600
7.5*83-2.5*9
=2.5*3*83-2.5*9
=2.5*(3*83-9)
=2.5*(249-9)
=2.5*240
=600