若a+b=2007,c+d=-1.求式子(a-c)-(-b+d)的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/23 16:17:33
![若a+b=2007,c+d=-1.求式子(a-c)-(-b+d)的值](/uploads/image/z/3851194-58-4.jpg?t=%E8%8B%A5a%2Bb%3D2007%2Cc%2Bd%3D-1.%E6%B1%82%E5%BC%8F%E5%AD%90%EF%BC%88a-c%EF%BC%89-%28-b%2Bd%EF%BC%89%E7%9A%84%E5%80%BC)
若a+b=2007,c+d=-1.求式子(a-c)-(-b+d)的值
若a+b=2007,c+d=-1.求式子(a-c)-(-b+d)的值
若a+b=2007,c+d=-1.求式子(a-c)-(-b+d)的值
(a-c)-(-b+d)
=a-c+b-d
=a+b-(c+d)
=2007-(-1)
=2008
(a-c)-(-b+d)
=a-c+b-d
=(a+b)-(c+d)
=2007-(-1)
=2008
2008
2008
先将后面去括号,就是a-c+b-d即(a+b)-(c+d)=2008