怎么写 老师教一下
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/12 15:11:21
![](http://img.wesiedu.com/upload/a/b1/ab1ee6a95ea69ddac9be5dc4860110ec.jpg)
![怎么写 老师教一下](/uploads/image/z/19291127-23-7.jpg?t=%E6%80%8E%E4%B9%88%E5%86%99+%E8%80%81%E5%B8%88%E6%95%99%E4%B8%80%E4%B8%8B)
解题思路: 乘法分配律逆运用,可解。
解题过程:
解:49×7.6-4.8×76
=49×7.6-48×7.6
=(49-48)×7.6
=1×7.6
=7.6;
解:3.75×4.8+62.5×0.48
=3.75×4.8+6.25×4.8
=(3.75+6.25)×4.8
=10×4.8
=48;
解题过程:
解:49×7.6-4.8×76
=49×7.6-48×7.6
=(49-48)×7.6
=1×7.6
=7.6;
解:3.75×4.8+62.5×0.48
=3.75×4.8+6.25×4.8
=(3.75+6.25)×4.8
=10×4.8
=48;