The multiplication rule of rational numbers: if two numbers are multiplied, the same sign will get positive, the different sign will get negative, and the absolute value will be multiplied Any number multiplied by 0 yields 0 How to fill in these blanks?

The multiplication rule of rational numbers: if two numbers are multiplied, the same sign will get positive, the different sign will get negative, and the absolute value will be multiplied Any number multiplied by 0 yields 0 How to fill in these blanks?

What you fill in is correct
Get the same sign
Different signs get negative
And multiply the absolute values
If any number is multiplied by 0, it must be: 0

What is the cross multiplication rule

Although cross multiplication is more difficult to learn, but once we learn it and use it to solve problems, it will bring us a lot of convenience. The following are my personal opinions on cross multiplication. 1. The method of cross multiplication: multiplication on the left side of the cross is equal to the coefficient of the quadratic term, multiplication on the right side is equal to the constant term, cross multiplication and addition is equal to one

How to determine the sign of the product of several rational numbers which are not equal to 0______ ．

According to the multiplication of several numbers not equal to zero, the sign of the product is determined by the number of negative factors: when there are odd negative factors, the product is negative; when the number of negative factors is even, the product is positive. So the answer is: when the number of negative factors is even, the product is positive; when the number of negative factors is odd, the product is negative