直接去下列各式中括号后的结果: a+(-b+c)等于? -a-(b-c)等于? x-(-y-x)等于? -x-4y-1的的相反数为?当<2时,化简|a-2|等于? x+2y-3=2y-( ) 谢谢!希望有过程
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 23:12:04
![直接去下列各式中括号后的结果: a+(-b+c)等于? -a-(b-c)等于? x-(-y-x)等于? -x-4y-1的的相反数为?当<2时,化简|a-2|等于? x+2y-3=2y-( ) 谢谢!希望有过程](/uploads/image/z/1750842-18-2.jpg?t=%E7%9B%B4%E6%8E%A5%E5%8E%BB%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E4%B8%AD%E6%8B%AC%E5%8F%B7%E5%90%8E%E7%9A%84%E7%BB%93%E6%9E%9C%EF%BC%9A+a%2B%28-b%2Bc%29%E7%AD%89%E4%BA%8E%3F+-a-%28b-c%29%E7%AD%89%E4%BA%8E%3F+x-%28-y-x%EF%BC%89%E7%AD%89%E4%BA%8E%3F+-x-4y-1%E7%9A%84%E7%9A%84%E7%9B%B8%E5%8F%8D%E6%95%B0%E4%B8%BA%3F%E5%BD%93%EF%BC%9C2%E6%97%B6%2C%E5%8C%96%E7%AE%80%7Ca-2%7C%E7%AD%89%E4%BA%8E%3F++++++++++++x%2B2y-3%EF%BC%9D2y-%EF%BC%88++++++++++++++++%EF%BC%89+++++++++++++++++++++++++++++++%E8%B0%A2%E8%B0%A2%21%E5%B8%8C%E6%9C%9B%E6%9C%89%E8%BF%87%E7%A8%8B)
直接去下列各式中括号后的结果: a+(-b+c)等于? -a-(b-c)等于? x-(-y-x)等于? -x-4y-1的的相反数为?当<2时,化简|a-2|等于? x+2y-3=2y-( ) 谢谢!希望有过程
直接去下列各式中括号后的结果: a+(-b+c)等于? -a-(b-c)等于? x-(-y-x)等于? -x-4y-1的的相反数为?
当<2时,化简|a-2|等于? x+2y-3=2y-( )
谢谢!希望有过程!谢谢!
直接去下列各式中括号后的结果: a+(-b+c)等于? -a-(b-c)等于? x-(-y-x)等于? -x-4y-1的的相反数为?当<2时,化简|a-2|等于? x+2y-3=2y-( ) 谢谢!希望有过程
1、a+(-b+c)=a-b+c
2、-a-(b-c)=-a-b+c
3、x-(-y-x)=x+y-x=y
4、 -x-4y-1的的相反数=-( -x-4y-1)=x+4y+1
5、因为 当a<2时
所以 a-2
a+(-b+c)=a-b+c
-a-(b-c)=-a-b+c
x-(-y-x)=x+y+x=2x+y
-x-4y-1的的相反数为-(-x-4y-1)=x+4y+1
当<2时,|a-2|=2-a
x+2y-3=2y-(3-x)
a+(-b+c)=a-b+c;-a-(b-C)=-a-b+c;x-(-y-x)=x+y+x=y+2x;-x-4y-1=-(-x-4y-1)=x+4y+1;当a<2时,|a-2|=-(a-2)=2+a;