7.2 Operations with 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 add two rational numbers with the same denominator?

Back

To add two rational numbers with the same denominator, you add the numerators and keep the denominator the same.

Front

How do you subtract two rational numbers with the same denominator?

Back

To subtract two rational numbers with the same denominator, you subtract the numerators and keep the denominator the same.

Front

What is the process for adding rational numbers with different denominators?

Back

To add rational numbers with different denominators, first find a common denominator, convert each fraction, then add the numerators.

Front

How do you multiply two rational numbers?

Back

To multiply two rational numbers, multiply the numerators together and the denominators together.

Front

How do you divide two rational numbers?

Back

To divide two rational numbers, multiply the first number by the reciprocal of the second number.

Front

What is the cost per item if a total cost of $26.50 is split among 5 people?

Back

Each person pays $5.30.

Front

What is the total cost of 4 chairs at $27.90 each and 2 tables at $37.95 each?

Back

The total cost is $187.50.

Front

If Jane buys 3 sheets of poster board for $1.29 each and a pack of construction paper for $3.79, how much does she spend?

Back

Jane spends $7.66.

Front

What is Leo's final elevation after starting at -19 meters, going up 9 meters, and down 8 meters?

Back

Leo's final elevation is -18 meters.