Operations with Rational Numbers

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Subtracting a negative number is equivalent to adding its absolute value.

The product of two negative numbers is positive.

The product of a negative number and a positive number is negative.

Count the number of negative factors: if the count is even, the product is positive; if odd, the product is negative.

The difference between two negative numbers can be found by subtracting their absolute values.

The result depends on the absolute values: if the positive number is larger, the result is positive; if the negative number is larger, the result is negative.

To perform operations with rational numbers, follow the rules of arithmetic: addition, subtraction, multiplication, and division, while paying attention to the signs.

The result is -4.

The result is positive.