Number System Review

Front

What is the additive inverse of a number?

Back

The additive inverse of a number is the value that, when added to the original number, results in zero. For example, the additive inverse of -9.2 is 9.2.

Front

Determine the additive inverse of -9.2.

Back

9.2

Front

What does the expression -3 + 2 represent?

Back

The expression -3 + 2 represents the addition of a negative number and a positive number, resulting in a value that is less than zero.

Front

What is the result of -3 + (-2)?

Back

-5

Front

How do you solve the equation 3 - (-2)?

Back

To solve 3 - (-2), you change the subtraction of a negative to addition: 3 + 2 = 5.

Front

If a container is evaporating rainwater at a rate of 1.6 inches per week, how do you find the total time to evaporate 24 inches?

Back

You divide the total inches by the rate: 24 inches ÷ 1.6 inches/week = 15 weeks.

Front

What is the solution to the equation 20.2 - 24.4?

Back

-4.2

Front

What is the difference between a positive and a negative number?

Back

A positive number is greater than zero, while a negative number is less than zero.

Front

What is the result of adding two negative numbers?

Back

The result of adding two negative numbers is always a negative number.

Front

What is the result of multiplying a positive number by a negative number?

Back

The result is a negative number.