102C) 1449     216  184 

Câu 30: Tính

a) 120: {390 :[5. 10

2

- (5

3

+ 35. 7)]}

b) 12.10

3

- (15.10

2

.2 + 18.10

2

.2: 3) + 2.10

2

c) 1449     216  184  : 8  . 9 