só đó là
(12+68)+(95+5)+53+47
=80+100+100
=180+100
=280
đúng ko vậy
12 + 68 + 95 + 53 + 47 + 5
= (12 + 68) + (95 + 5) + (53 + 47)
= 80 + 100 + 100
= 280
12 + 68 + 95 + 53 + 47 + 5
= ( 12 + 68 ) + ( 95 + 5 ) + ( 53 + 47 )
= 80 + 100 + 100
= 280
12 + 68 + 95 + 53 + 47 + 5
= ( 12 + 68 ) + ( 95 + 5 ) + ( 53 + 47 )
= 100 x 3
= 300
nha bn
12 + 68 + 95 + 53 + 47 + 5
= ( 12 + 68 ) + ( 95 + 5 ) + ( 53 + 47 )
= 80 + 100 + 100
= 180 + 100
= 280
