Tính giá trị biểu thức
2. Tính GTBT
A= 15,37.0,12-0,12.13,37
B= (1,96-5,5.1,96):(-6,0324+1,5324)
C= (15,25+3,75).4+(20,71+5,29).5
D= 3,16.9+2,84.9-(7,2.1,25).[-2,04-(-31-4,9)]
A= 15,37.0,12-0,12.13,37
B= (1,96-5,5.1,96):(-6,0324+1,5324)
C= (15,25+3,75).4+(20,71+5,29).5
D= 3,16.9+2,84.9-(7,2.1,25).[-2,04-(-31-4,9)]