a)115x9-115x7+8x115
=115x(9-7+8)
=115x10
=1150
b)4667+3378:(4555:5-905)
=4667+3378:(911-905)
=4667+3378:6
=4667+563
=5230
p/s tham khảo nhé
A) 115 x 9 - 115 x7 + 115 x 8
115 x (9-7+8)=115 x 10 =1150
a)=115*(9-7+8)=115*10=1150
b)=4667+3378/(911-905)=4667+3378/6=4667+563=5230
bằng : 1150 nha em