Tính hợp lý 0,12×90-110×0,6+36-25×6

$\displaystyle  \begin{array}{{>{\displaystyle}l}}
0,12.90-110.0,6+36-25.6\\
=0,06\ \times \ 2\ \times \ 90\ -\ 110\ \times \ 0,6\ +\ 36\ -\ 25\ \times \ 6\\
=0,01\ \times \ 6\ \times 2\ \times 90\ -\ 11\ \times \ 10\ \times \ 0,6+6\ \times \ 6-25\ \times \ 6\\
=6\ \times \ 0,9\ \times \ 2\ -\ 11\ \times \ 6\ +\ 6\times \ 6-25\ \times \ 6\\
=6\times \ 1,8-11\ \times \ 6+6\ \times \ 5-25\times 6\\
=6\ \times \ ( 1,8-11+6-25)\\
=6\ \times \ ( -28,2)\\
=\ -169,2
\end{array}$