45 - 5. ( 12 + 9 )
= 45 - 5 . 9 + 12 . 5
= 45 - 45 - 60
= 0 - 60
= -60
45 - 5 . ( 12 + 9 )
= 45 - 5 . 9 + 5 x 12
= 45 - 45 + 60
= 0 + 60
= 60
45 - 5 . ( 12 + 9 )
= 45 - 5 x 21
= 45 - 105
= - 60
Đoán vậy
Tk mk nha
45 - 5 x ( 12 + 9 )
= 45 - 5 x 9 + 5 x 12
= 45 - 45 + 60
= 0 + 60
= 60
45 - 5 . (12 + 9)
=45 - 5 . 12 + 5 . 9
=45 - 60 - 45
= 45 - 45 - 60
= 0 - 60
= - 60
\(45-5.\left(12+9\right)\)
\(=45-\left[\left(5.12\right)+\left(5.9\right)\right]\)
\(=45-\left[60+45\right]\)
\(=45-105\)
\(=-60\)
45 - 5 ( 12 + 9 )
= 45 - 5 * 21
= 45 - 105
= - 60
