`32 xx 5 + 7 xx 32 - 16 xx 12`

`= 32 xx ( 5 + 7) - 16 xx 12`

`= 32 xx 12 - 16 xx 12`

`= 12 xx ( 32 - 16 )`

`= 12 xx 16`

`= 192`

 $\color{orange }{\text{#Fan}}$ $\color{red }{\text{Chú 9}}$