To additions, commmutative law means you can change the sequence of the numerals to get the same result(such as: 3+5=5+3), while associative law means you can add any amounts of numerals together first to get the same result[such as: (5+9)+4=5+(9+4)].

• 翻译：对于加法，交换律是指可以改变加数的顺序进行运算结果不变（如：3+5=5+3），而结合律则是指可以将任意的几个加数先相加结果不变[如：（5+9）+4=5+（9+4）]。