妈妈给红红18.2元钱,让她去买5斤挂面,4斤面粉,结果她把买挂面和买面粉的数量给弄颠倒了,剩下了0.4元那么面粉每斤几元,挂面每斤几元?用两元一次方程来解.
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 06:58:13
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