A=12:{390[500-(125+35x7)]}
A = 12 : { 390 : [ 500 - ( 125 + 35 . 7 ) ] }
a) 28 . 64 + 28 . 36 b) 12: {390 : [500 - (125 + 35 . 7)]}
gia tri bieu thuc:
A=12 :{390:[500-(125+35.7)]}
12:{390:[500-(125+35.7)]}
12 : { 390 :[500-(125+357)]} = ?
12: {390:[500-(125+35x7)]}=
12:{390:[500-(125+35.7)]}
12:{390:[500-(125+482)]}