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Addition - Wikipedia, the free encyclopedia
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日期：2025-12-17
1 Notation and terminology 2 Interpretations 2.1 Combining sets 2.2 Extending a length 3 Properties 3.1 Commutativity 3.2 Associativity 3.3 Identity element 3.4 Successor 3.5 Units 4 Performing addition 4.1 Innate ability 4.2 Discovering addition as child...看更多
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