This topic is based on additive commutative law and the law of association; Fill in the blanks with the meanings of multiplicative commutative law, associative law and distributive law.

Solution: Solution: The position of the commutative addend and its sum remains unchanged, which is called additive commutative law;

When three numbers are added, the first two numbers can be added before the third number, or the last two numbers can be added before the first number, and the sum is unchanged, which is called the addition associative law;

When two numbers are multiplied, the position product of the exchange multiplier remains unchanged, which is called the multiplication exchange law;

Multiplication of three numbers means that the first two numbers are multiplied and then the third number is multiplied, or the last two numbers are multiplied and then the first number is multiplied, and the product is the same, which is called the law of multiplication and association;

The sum of a number multiplied by two numbers is equal to the sum of the products of this number multiplied by these two numbers. This is called the law of multiplication and distribution.

So the answer is: exchange, combination, exchange, combination, distribution.