Expression 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 performing operations and combining like terms.

Front

What is the order of operations?

Back

The order of operations is a set of rules that dictates the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right) - often remembered as PEMDAS.

Front

What is absolute value?

Back

Absolute value is the distance of a number from zero on the number line, regardless of direction. It is always a non-negative value.

Front

How do you write an equation from a word problem?

Back

To write an equation from a word problem, identify the quantities involved, assign variables, and translate the relationships into mathematical expressions.

Front

What is a factor in mathematics?

Back

A factor is a number that divides another number evenly, without leaving a remainder.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting numbers for variables and performing the operations.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, meaning you can distribute a factor across a sum.

Front

What is a variable in mathematics?

Back

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

Front

What is a coefficient?

Back

A coefficient is a numerical factor that multiplies a variable in an expression, such as 4 in 4x.