Evaluate Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that includes numbers, variables, and operation symbols (like +, -, ×, ÷). For example, 2x + 3 is an algebraic expression.

Front

Evaluate 2r + 1 if r = 3.

Back

7

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with given numbers.

Front

Evaluate 4y if y = 3.

Back

12

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines 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

Evaluate 2(a - 5) + 2 when a = 15.

Back

22

Front

What is a variable in an algebraic expression?

Back

A variable is a symbol (usually a letter) that represents an unknown number. For example, in the expression 3x, 'x' is the variable.

Front

Evaluate (x + y) ÷ 2 if x = 14 and y = 6.

Back

10

Front

What is the purpose of using parentheses in algebraic expressions?

Back

Parentheses are used to indicate which operations should be performed first in an expression.

Front

Evaluate 28/m when m = 4.

Back

7