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四则运算

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四则运算,即,是数学最基本的算术运算。如果加减乘除放在同一个算式列中的话,其计算的顺序是“先乘除,后加减”,括号内先算。四则运算的起源很早,几乎在数学产生时就有了。[1]

四则运算规则

  1. 中序遍历由左而右计算。例:
  2. 先算× ÷,后算 + −(先乘除后加减)。例:
  3. 有括号的,先算括号内的,再算括号外的;有多重括号的,先算小括号,再算中括号,最后算大括号。如:

参见

  • 有限域是进行加减乘除运算都有定义并且满足特定规则的集合。

参考文献

  1. ^ 《数学辞海》编辑委员会 (编). 数学辞海. 第一卷. 北京: 中国科学技术出版社. 2002: 40. 
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四则运算
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