1(+8）+(-10)+（-2）+(+1)
问题描述：
1(+8）+(-10)+（-2）+(+1)
2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)
3(+0.65)+(-1.9)+(-0.1)+(+0.65)
4(+1/2）+（-2/3)+(+4/5)+(-1/2)+(-1/3)
5(-10/3)+(+15.5)+(-50/3)+(-5.5)
6(+1/16)+(-3.5)+(-2.5)+(+15/16)
7(+1)+(-21/2)+(-83/37)+(-9.5)
8(+0.5)+(13/4)+(-2.75)+(+11/2)
答
楼上后面两题都做错了1(+8）+(-10)+（-2）+(+1)=(8+1)-(10+2)=9-12=-32(-5）+（+6）+（-3）+(-9)+(+4）+（+7)=(6+4+7)-(5+3+9)=17-17=03(+0.65)+(-1.9)+(-0.1)+(+0.65)=0.65-1.9-0.1+0.65=(0.65+0.65)-(1.9+0.1)=1.3...