Front

What is a negative number?

Back

A number that is less than zero, often represented with a minus sign (e.g., -1, -5).

Front

What is the sum of r + r + r + 12 + 7?

Back

3r + 19

Front

What are opposites in mathematics?

Back

Two numbers that are the same distance from zero on the number line but in opposite directions (e.g., 12 and -12).

Front

Are there more positive integers than negative integers?

Back

False; there is an equal amount of positive and negative integers.

Front

What is the inverse operation of subtraction?

Back

Addition.

Front

What is an absolute value?

Back

The distance of a number from zero on the number line, regardless of direction (e.g., |5| = 5 and |-5| = 5).

Front

What is a positive integer?

Back

A whole number greater than zero (e.g., 1, 2, 3).

Front

What does it mean to simplify an expression?

Back

To combine like terms and reduce the expression to its simplest form.

Front

What is a variable in mathematics?

Back

A symbol, often a letter, that represents an unknown value (e.g., r in the expression r + 5).

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression is a combination of numbers, variables, and operations without an equality sign.