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

How do you multiply two rational numbers?

Back

To multiply two rational numbers, multiply their numerators together and their denominators together. The product is then simplified if possible.

Front

What is the product of two negative numbers?

Back

The product of two negative numbers is a positive number.

Front

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

Back

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

Front

How do you evaluate the expression (–8)(–3) + (-10)?

Back

First, multiply -8 and -3 to get 24. Then, add -10 to get 14.

Front

What is the result of multiplying (2.5)(-1.2)?

Back

The result of multiplying (2.5)(-1.2) is -3.

Front

What is the product of (-0.2)(-0.8)?

Back

The product of (-0.2)(-0.8) is 0.16.

Front

How do you add two fractions with different denominators, such as -3/8 and -2/5?

Back

To add fractions with different denominators, find a common denominator, convert each fraction, and then add the numerators.

Front

What is the common denominator of 8 and 5?

Back

The common denominator of 8 and 5 is 40.

Front

What is the simplified form of -31/40?

Back

-31/40 is already in its simplest form.