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

What is the sum of two negative numbers?

Back

The sum of two negative numbers is always negative.

Front

What is the product of two negative numbers?

Back

The product of two negative numbers is always positive.

Front

What is the difference of two rational numbers?

Back

The difference of two rational numbers is found by subtracting the second number from the first.

Front

How do you add a positive and a negative rational number?

Back

To add a positive and a negative rational number, subtract the absolute value of the negative number from the positive number and keep the sign of the number with the larger absolute value.

Front

What is the cost per item if the total cost is divided by the number of items?

Back

The cost per item is calculated by dividing the total cost by the number of items.

Front

What does it mean to round to the nearest cent?

Back

Rounding to the nearest cent means adjusting a monetary amount to the closest hundredth place.

Front

What is the equivalent expression for adding a negative number?

Back

Adding a negative number is equivalent to subtracting the absolute value of that number.

Front

How do you calculate change from a purchase?

Back

To calculate change, subtract the total cost of the purchase from the amount paid.

Front

What is the rule for multiplying fractions?

Back

To multiply fractions, multiply the numerators together and the denominators together.