11 + 67 x 24 + 12 + 55 - 24
= 11 + 55 + 67 x 24 - 24 + 12
= 66 + 24 x (67 - 1) + 12
= 66 + 24 x 66 + 12
= 66 x (24 + 1) + 12
= 66 x 25 + 12
= 1650 + 12
= 1662
11 + 67 x 24 + 12 + 55 - 24
= 11 + 55 + 24 x ( 67 - 1) + 12
= 66 + 24 x 66 + 12
= 66 x ( 1 + 24 ) + 12
= 66 x 25 + 12
= 1650 + 12
= 1662
11 + 67 * 24 + 12 +55 - 24
11 + 55 + 24 * ( 67 - 1 ) + 12
66 + 24 * 66 + 12
66 * ( 1 + 24 ) + 12
66* 25 + 12
1650 + 12
1662
Dau sao la nhan nha
HOC TOT !!!!!!!!!!!!!!!!!!!