Unit 3: Expressions Unit Test Review

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form by combining like terms and performing operations.

Front

What is a variable?

Back

A variable is a symbol (usually a letter) that represents an unknown value in an expression or equation.

Front

How do you identify the terms in an expression?

Back

Terms in an expression are separated by + or - signs. For example, in 3x + 7 + p - 12, the terms are 3x, 7, p, and -12.

Front

What is the expanded form of an expression?

Back

Front

What is a coefficient?

Back

A coefficient is a number that is multiplied by a variable in an expression. For example, in 5x, 5 is the coefficient.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change. In the expression 3x + 5, the number 5 is a constant.

Front

How do you evaluate an expression?

Back

To evaluate an expression, substitute the values of the variables into the expression and perform the operations.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign and represents a value, while an equation states that two expressions are equal.

Front

What does it mean to combine like terms?

Back

Combining like terms means to add or subtract terms that have the same variable raised to the same power.