Q北雁南回Q 开发者_如何学JAVA 2022-05-29 22:11 这个题就是把小数变为分数,0.2可以看做0.2/1,分子分母各乘以10,得出2/10,约分除以5,得出1/5元,0.2元就是2角,希望没有误导你。上课注意听讲,其实每[详细]
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