Tính giá trị các biểu thức sau: a) A = [(-0,5) - 3/5] : (-3) + 1/3 - (-1/6) : (-2)

a) A=−0,5−35:−3+13−−16:−2

A=−12−35:−3+13−−16.1−2

A=−510−610:−3+13−112

A=−1110.1−3+13−112

A=1130+13−112

A=3760

Vậy A=3760

b) B=225−0,036:1150−314−249.929

B=225−9250:1150−134−229.929

B=20250−9250:1150−11736−8836.929

B=11250:1150−2936.929

B=11250.5011−936

B=15−14

B=420−520=−120