-18+(-7.5)-(-31)-12.5计算 一定赞哦
问题描述:
-18+(-7.5)-(-31)-12.5计算 一定赞哦
答
=-25.5+31-12.5
=5.5-12.5
=-7
-18+(-7.5)-(-31)-12.5计算 一定赞哦
=-25.5+31-12.5
=5.5-12.5
=-7