初一有理数的除法(要列式)
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:2024/07/14 22:06:12
初一有理数的除法(要列式)
-3-[-5+(1-0.2*5分之3)/(-2)]
-3-[-5+(1-0.2*5分之3)/(-2)]
![初一有理数的除法(要列式)](/uploads/image/z/6363611-35-1.jpg?t=%E5%88%9D%E4%B8%80%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E9%99%A4%E6%B3%95%EF%BC%88%E8%A6%81%E5%88%97%E5%BC%8F%EF%BC%89)
-3-[-5+(1-0.2*5分之3)/(-2)]
=-3-[-5+(1-1/5*3/5)/(-2)]
=-3-[-5+(1-3/25)/(-2)]
=-3-[-5+(22/25)/(-2)]
=-3-[-5+22/25*(-1/2)]
=-3-[-5-11/25]
=-3+5+11/25
=2+11/25
=2又11/25
=-3-[-5+(1-1/5*3/5)/(-2)]
=-3-[-5+(1-3/25)/(-2)]
=-3-[-5+(22/25)/(-2)]
=-3-[-5+22/25*(-1/2)]
=-3-[-5-11/25]
=-3+5+11/25
=2+11/25
=2又11/25