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 different denominators?

Back

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

Front

What is the process for subtracting rational numbers?

Back

To subtract rational numbers, find a common denominator, convert the fractions, and then subtract 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

What is the rule for dividing rational numbers?

Back

To divide by a rational number, multiply by its reciprocal (invert the second fraction and multiply).

Front

What is the average of a set of numbers?

Back

The average is the sum of the numbers divided by the count of the numbers.

Front

How do you round a decimal to the nearest cent?

Back

To round a decimal to the nearest cent, look at the third decimal place. If it's 5 or more, round up; if it's less than 5, round down.

Front

What does it mean to find the product of two negative numbers?

Back

The product of two negative numbers is always positive.

Front

How do you calculate the total deductions from multiple paychecks?

Back

To calculate total deductions, multiply the amount deducted from one paycheck by the number of paychecks.

Front

What is the significance of a negative change in price?

Back

A negative change in price indicates a decrease in the price of an item.