Question

帮我解答一下（要有过程）

-2.5+（-1/5） 0.4-（-1/4）+1/6 1/3-（-5/6）+2/3
1/3+（-1/5）+1+2/3 27-18+（-7）-32 0.5+（-1/4）-（-2.75）+1/2

Answer 1

-2.5+（-1/5）= -2.5 -0.2=-2.7

0.4-（-1/4）+1/6 = 0.4 + 0.25 + 1/6 = 0.65 + 1/6 = 65/100 + 1/6
= 13/20 + 1/6 = 39/60 + 10/60 = 49/60

1/3-（-5/6）+2/3 = 2/6 + 5/6 + 4/6 = 11/6

1/3+（-1/5）+1+2/3 = 5/15 - 3/15 + 15/15 + 10/15 = 27/15 = 9/5

27-18+（-7）-32 = 9 - 7 - 32 = -30

0.5+（-1/4）-（-2.75）+1/2 = 0.5 - 0.25 + 2.75 + 0.5 = 3.5

Answer 2

-2.5+（-1/5）=-2.5-0.2=-2.7
0.4-（-1/4）+1/6 =2/5+1/4+1/6=24/60+15/60+10/60=49/60
1/3-（-5/6）+2/3=1/3+5/6+2/3=2/6+5/6+4/6=11/6
1/3+（-1/5）+1+2/3 =1/3-1/5+1+2/3=5/15-3/15+1+10/15=27/15=9/5
27-18+（-7）-32 =27 -18-7-32= -30
0.5+（-1/4）-（-2.75）+1/2=0.5-0.25+2.75=3

Answer 3

-2.5+（-1/5）= -2.5 -0.2 = -2.7
0.4-（-1/4）+1/6 = 2/5 + 1/4 + 1/6 = (24+15+10)/60 = 49/60
1/3-（-5/6）+2/3 = 1/3 + 5/6 + 2/3 = 1+5/6 = 11/6
1/3+（-1/5）+1+2/3 = 1/3 - 1/5 + 1 + 2/3 = 2 -1/5 = 9/5
27-18+（-7）-32 = 27 - 18 - 7 - 32 = 27 - 57 = -30
0.5+（-1/4）-（-2.75）+1/2 = 0.5 - 0.25 + 2.75 + 0.5 = 3.5