Question

Answer 1

Bài 5:

3*m+5*n+2*m+n+m

=6m+6n

=6(m+n)=6*25=150

Answer 2

\(3\times m+5\times n+2\times m+n+m\)

\(=3\times m+2\times m+m+5\times n+n\)

\(=m\times\left(3+2+1\right)+n\times\left(5+1\right)\)

\(=6\times m+6\times n\)

\(=6\times\left(m+n\right)\)

\(=6\times25\)

\(=150\)