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There are two main checking methods for multiplication formulas:
Method 1: check the position of the factor in the exchange formula, which is based on the law of multiplication intersection;
Method 2, product, where one factor = another factor, is based on the reciprocal relationship of multiplication and division.
So the answer is: correct.
Learning division is very simple, but it must be made clear: the dividend is before the divisor, the divisor is after the divisor, and the quotient is after the equal sign (quotient is required); Then the multiplication formula must be memorized; When doing division, you can think like this-what number is the divisor multiplied by? (For example, how much is 56 divided by 8? You can think of it this way: 7 times 8 equals 56, so 56 divided by 8 equals 7).
I believe that if you can recite the multiplication formula, you will definitely do the division problem.
If it is not divisible, look at the remainder and write the remainder after the quotient.
Reference Baidu Encyclopedia-Branch