(+3)+(-6)= (+18)+(+12)= (-2.3)+(+3.2)

问题描述:

(+3)+(-6)= (+18)+(+12)= (-2.3)+(+3.2)
(+3)+(-6)= (+18)+(+12)= (-2.3)+(+3.2)= (+32)+(-3/5)= 2.75+(-2又3/4)= (-0.9)+(-2.7)=

-3,30,0.9,31.4,0,-3.6