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51问答网 > 20元阧12元9角怎么算？

20元阧12元9角怎么算？

2025-03-28 21:59:44

推荐回答（4个）

回答1：

20元➖12元9角=7元1角
角不够减，向元借1转化成10角
10角-9角=1角，
20元被借1元，剩下19元
19-12=7元
合起来就是7元1角。

回答2：

解:1元=10角
12元9角=12.9元
所以:
20元-12元9角
=20-12.9
=7.1(元)

回答3：

12元9角=12.9元
20元－12元9角=20元－12.9元=7.1元

回答4：

可以变成20.0－12.9
=7.1
读为7元1角

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