Evaluating Algebraic Expressions Ninos Heroes

Front

What is a variable in an algebraic expression?

Back

A variable is a symbol, often a letter, that represents an unknown value in an algebraic expression.

Front

How do you evaluate an expression when given a value for the variable?

Back

To evaluate an expression, substitute the given value for the variable and perform the arithmetic operations.

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 does it mean to simplify an algebraic expression?

Back

To simplify an algebraic expression means to combine like terms and perform any arithmetic operations to make the expression as concise as possible.

Front

What is the result of evaluating the expression 3x + 8 when x = 2?

Back

The result is 14.

Front

How do you solve for a variable in an equation?

Back

To solve for a variable, isolate the variable on one side of the equation using inverse operations.

Front

What is the value of the expression x - 8 when x = 12?

Back

The value is 4.

Front

What is the result of the expression 4 + 2 x 8?

Back

The result is 20, following the order of operations.

Front

How do you evaluate a fraction with variables, such as (a-b)/3?

Back

Substitute the values of a and b into the expression, then perform the subtraction and division.

Front

What is the value of (a-b)/3 when a = 9 and b = 6?

Back

The value is 1.