(+3)+(+4)= +7
(-2)+(+8)=+6
(-0.25)+(+0.75)=+0.5
(-2)+(-5)=-7
(-9)+(+6)=-3
0+(-3.6)=-3.6
计算：(+3)+(+4)= (-2)+(+8)= (-0.25)+(+0.75)= (-2)+(-5)= (-9)+(+6)= 0+(-3.6)=
计算：(+3)+(+4)= (-2)+(+8)= (-0.25)+(+0.75)= (-2)+(-5)= (-9)+(+6)= 0+(-3.6)=
数学人气：293 ℃时间：2020-03-28 12:36:46
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