commutative law of addition

例句：

1. 1. In mathematics, the commutative law ofaddition is a fundamental principle that states thataddition is associative and commutative.
   在数学中，加法公理是一个重要的原则，它表明加法是可交换的和可结合的。
2. 2. The commutative law of additionis crucial in solving equations involving multiple variables.
   加法公理在解决涉及多个变量的方程时至关重要。
3. 3. The commutative law of additionis often used in programming languagesto ensure that addition operations are performedcorrectly.
   加法公理在编程中常用来确保加法操作得到正确的执行。