来自焦炳旺的问题
先化简,再求比值.25厘米:12千米=______:______=______;450克:12千克=______:______=______;5时:1时40分=______:______=______.
先化简,再求比值.
25厘米:12千米=______:______=______;
450克:12千克=______:______=______;
5时:1时40分=______:______=______.
1回答
2020-04-05 06:58