来自鲁佳琪的问题
【几道有理数加减法的填空题.(-20)+(+3)-(-5)-(+7)=___+___+___+___=___=___;(+9)-(+10)+(-2)-(-8)+2=___+___+___+___+___=___.】
几道有理数加减法的填空题.
(-20)+(+3)-(-5)-(+7)=___+___+___+___=___=___;
(+9)-(+10)+(-2)-(-8)+2=___+___+___+___+___=___.
1回答
2020-07-19 19:15