1 additive commutative law: a+b=b+a Two addends exchange places, and the sum remains unchanged, which is called additive commutative law.

2. Additive associative law; (a+b)+c=a+(b+c) Add the first two numbers or add the last two numbers first, and the sum is unchanged. ...

3 Multiplicative commutative law: a×b=b×a commutates the positions of two factors, and the product remains unchanged. This is the so-called multiplication commutative law.