7th Grade Math Milestone Review for Expressions and Equations

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value. For example, 2h + 8 is an expression.

Front

What is the first step to solve the equation 2x + 8 = 9?

Back

Subtract 8 from both sides.

Front

What is the highest elevation in the continental United States if the difference between the highest and lowest elevations is 14,776 feet and the lowest elevation is -282 feet?

Back

14,494 feet.

Front

True or False: When you divide by a negative coefficient in an inequality, you must flip the inequality sign.

Back

True.

Front

What should you do next to solve the equation 4x = 16?

Back

Divide both sides by 4.

Front

What is the definition of a variable in mathematics?

Back

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

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value(s) of the variable(s) that make the equation true.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a numerical factor that multiplies a variable. For example, in 5x, 5 is the coefficient.

Front

What is the solution to the equation 3x + 6 = 15?

Back

x = 3.