36 x 5 + 72 x 2 - 216 + 144
= 36 x 5 + 72 x 2 - 36 x 6 + 72 x 2
= 36 x (5 - 6) + 2 x (72 + 72)
= 36 x (-1) + 2 x 144
= -36 + 288
= 252
=36*5+36*2*2-(216-144).
=36*5+36*4-72.
=36*5+36*4-36*2.
=36*(5+4-2).
=36*7.
=252.
36 x 5 + 72 x 2 - 216 + 144
= 36 x 5 + 36 x 2 x 2 - 36 - 72
= 36 x 5 + 36 x 4 - 36 x 2
= 36 x (5 + 4 - 2)
= 36 x 7
= 252
Ta có : 36 x 5 + 72 x 2 - 216 + 144
=> : 36 x 5 + 72 x 2 - 36 x 6 + 72 x 2
=> : 36 x ( 5 - 6 ) + 2 x ( 72 + 72 )
=> : 36 x ( -1 ) + 2 x 144
= > : -36 + 288 = ?
<+> : 252 !