Question

cho biểu thức :(-m+n-p)-(-m-n-p) hãy rút gọn biểu thức

Answer 1

\(\left(-m+n-p\right)-\left(-m-n-p\right)\)

\(=-m+n-p+m+n+p\)

\(=\left(-m+m\right)+\left(-p+p\right)+\left(n+n\right)\)

\(=2n\)

Vậy \(\left(-m+n-p\right)-\left(-m-n-p\right)=2n\)

Answer 2

\(\left(-m+n-p\right)-\left(-m-n-p\right)\)

\(=-m+n-p+m+n+p\)

\(=\left(-m+m\right)+\left(-p-p\right)+\left(n+n\right)\)

\(=0+0+\left(n+n\right)\)

\(=0+\left(n+n\right)\)

\(=n+n\)

\(=2n\)

Vậy biểu thức (-m+n-p)-(-m-n-p) =2n