Trl :
8 x 24 - 16 x 2
= 8 x 24 - 8 x 2 x 2
= 8 x ( 24 - 4 )
= 8 x 20
= 160
Hok tốt
8 . 24 - 16 . 2
= 8 . 24 - 8 . 2 . 2
= 8 ( 24 - 2 - 2 )
= 8 . 20
= 160
\(8.24-16.2\)
\(=16.12-16.2\)
\(=16\left(12-2\right)\)
\(=16.10\)
\(=160\)
8 . 24-16.2
=16 .12 -16.2
= 16.(12-2)
16.10=160