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 product of two negative numbers?

Back

The product of two negative numbers is always positive.

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 always negative.

Front

How do you divide a number by a fraction?

Back

To divide a number by a fraction, multiply the number by the reciprocal of the fraction.

Front

What is the formula to find the total cost when buying multiple items?

Back

Total Cost = Number of Items × Cost per Item.

Front

How do you round a number to the nearest cent?

Back

To round 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 add a negative number?

Back

Adding a negative number is the same as subtracting the absolute value of that number.

Front

What is the equivalent expression for adding a negative number?

Back

Adding a negative number is equivalent to subtracting the positive version of that number.

Front

How do you calculate the cost of one item when given the total cost and quantity?

Back

Cost per Item = Total Cost ÷ Number of Items.

Front

What is the result of subtracting a larger number from a smaller number?

Back

Subtracting a larger number from a smaller number results in a negative number.