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作者 : Tika Downey
分類 : Mathematics
關鍵字 : Zero>
I don't think it is a good book .................because I can't learn this book's meaning & many words are very very very very very very very very very very very very very very very very very very very very very very very very very very very very............................................................hard,so it is not a good book for smaller than 20 years old people/workers/students......... to watch.
The history of zero : Exploring our place-value number system
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