2.4 Multiplying Rational Numbers

Front

What is a rational number?

Back

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

Front

What happens when you multiply a positive rational number by a negative rational number?

Back

The product is negative.

Front

What happens when you multiply two negative rational numbers?

Back

The product is positive.

Front

What is the product of a positive number and a negative number?

Back

The product is negative.

Front

What is the product of two positive numbers?

Back

The product is positive.

Front

How do you determine the sign of the product of two rational numbers?

Back

If the numbers have the same sign, the product is positive. If the numbers have different signs, the product is negative.

Front

Calculate the sign of the expression: 4/9 × (-6/7) without multiplying.

Back

Negative.

Front

Calculate the sign of the expression: (-157) · (2.3) without multiplying.

Back

Negative.

Front

Calculate the sign of the expression: (-7)(-8.2) without multiplying.

Back

Positive.

Front

What is the rule for multiplying fractions?

Back

Multiply the numerators together and the denominators together.