我都被搞懵了,我已经拿出了我的全部积蓄（-2.2）+3.8(+41)+(-75)15+(-22)1/2+(-2/3)(-10)+(+6)2/5+(-3/5)(-1/3)+2/5(-31/4)+(-11/12)30+(-20)23+(-17)+6+(-22)(-8)+10+2+(-1)5+(-6)+3+9+(-4)+(-7)(-0.8)+1.2+(-0.7)+9(-2.1)=0.8+3.5

Answer 1

（-2.2）+3.8 =1.6
(+41)+(-75) =-34
15+(-22) =-7 1/2+(-2/3) =-1/6 (-10)+(+6) =-4
2/5+(-3/5)=-1/5 (-1/3)+2/5 =1/15 (-3 1/4)+(-1 1/12) =-26/3 30+(-20) =10
23+(-17)+6+(-22)=-10 (-8)+10+2+(-1)=3 5+(-6)+3+9+(-4)+(-7) =0
(-0.8)+1.2+(-0.7)+9(-2.1)=-0.5-18.9 =-19.4
1/2+(-2/3)+4/5+(-1/2)+(-1/3)-1/5
7.2-(-4.8) =2.4 (-3 1/2)-5 1/4=--67/4 (+4)-(-7) =11 1.9-(-0.6) =2.5