(+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:676 ℃时间:2020-03-28 12:36:46
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