2,3,4,5,6,

2,3,4,5,6,
2,3,4,5,6,
 

2,3,4,5,6,
1、A
2、A
3、A
4、-8
5、37.6
6、（1）=-8+（-6)=-14
(2)=-10+4-6=-12
(3)=17-8×3/2=17-12=5
(4)=(-9*1/9-0.8)*2/9*(-21/4)=(-9/5)*2/9*(-21/4)=21/10
(5)=-1*1/25*(-5/2)+1/2=3/5

AAA，-8，37.6，第6题太模糊，看不清幂是多少了。

2 3 4 5 6 2+5+4-3-6 2,3,4,5,6 5+3-2+4-6 2,3,4,5,6, 2,3,4,5,6, 2,3,4,5,6, 2,3,4,5,6 2 3 4 5 6 2,3,4,5,6 2 3 4 5 6 2,3,4,5,6 (-5/4+5/6-3/2+11/4)/6/5 4/6+5/6+2/3 5/6×（3/4+2/5） 1/1=1 1/2+2/2+1/2=21/3+2/3+3/3+2/3+1/3=31/4+2/4+3/4+4/4+3/4+2/4+1/4=41/5+2/5+3/5+4/5+5/5+4/5+3/5+2/5+1/5=51/6+2/6+3/6+4/6+5/6+6/6+5/6+4/6+3/6+2/6+1/6=6 5/4+6/5-3/2+6/1 /是分之 2 3 4 5 6 8 9