4 2-2 +(3-7)-2
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/31 21:42:01
![4 2-2 +(3-7)-2](/uploads/image/z/3845092-4-2.jpg?t=4+2-2+%2B%283-7%29-2)
x)3Q05R055I* idq;.Y|]ީOv)EuL|ټɎ>k{iL,l#]
t Myj-TFWDCČMlۀ9t>bY)+uyڿ&@iM5511%04656 Z
4 2-2 +(3-7)-2
4 2
-2 +(3-7)-2
4 2-2 +(3-7)-2
太简单了
我都不知怎么写了
42 - 2 + (3-7)-2
=42 - 2 - 4 - 2
=34
有必要用括号吗42-2+3-7-2=40+3-7-2=43-7-2=43-9=43-10+1=33+1=34