高分！！！有理数加，减，乘混合运算．急用！写过程

-27/5+1/5+（-0.6）+0.35+1/4

-11/3+（-2.75）+5/3+3.85

（-5/4）-（+21/4）-（-25/3）-（-7/2）

（-3.3）+4.2-3.2+31/5

2/3-（-1.25）-5/2+（-19/4）

（7/2+7/3）-〔（-16/3）-5/2〕

-1/8-〔-3/8-1.25+（-6+5/4-3.75）-3/4〕

-11/2+36-13/3+7-10.8+22/3-12

-1/2+1/3-1/4-1/5+1/6

3.75+1/2-14/3-1/2-27/4

（1/2+2/3+3/4）乘（-12）
在30分钟内，（24日的）完成，加20分

-27/5+1/5+(-0.6)+0.35+1/4
=-27/5+1/5+(-0.6)+0.35+0.25
=-26/5+(-0.6)+0.6
=-26/5
-11/3+(-2.75)+5/3+3.85
=-11/3+5/3+1.1
=-6/3+1.1
=-2+1.1
=-0.9
(-5/4)-(21/4)-(-25/3)-(-7/2)
=21/4+14/4-5/4+25/3
=30/4+25/3
=15/2+25/3
=45/6+50/6
=95/6
(-3.3)+4.2-3.2+31/5
=4.2-3.3-3.2+6.2
=4.2-6.5+6.2
=3.9
2/3-(-1.25)-5/2+(-19/4)
=2/3-5/2+5/4-19/4
=2/3-24/4
=2/3-6
=-16/3
(7/2+7/3)-[(-16/3)-5/2]
=7/2+5/2+7/3+16/3
=12/2+23/3
=6+23/3
=41/3
-1/8-[-3/8-1.25+(-6+5/4-3.75)-3/4]
=-1/8+3/8+1.25-(-9.75+1.25)-0.75
=0.25+1.25+8.5-0.75
=1.5+8.5-0.75
=10-0.75
=9.25
-11/2+36-13/3+7-10.8+22/3-12
=36+7-12-10.8+22/3-13/3-11/2
=31-10.8+9/3-5.5
=20.2+3-5.5
=17.7
-1/2+1/3-1/4-1/5+1/6
=2/6+1-6-1/2-1/4-1/5
=1/2-1/2-1/4-1/5
=-5/20-4/20
=-9/20
3.75+1/2-14/3-1/2-27/4
=15/4-14/3-27/4