Evaluate Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols (like +, -, *, /). For example, 2x + 3 is an algebraic expression.

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 the expression: 0.2t when t = 1.6

Back

0.32

Front

Evaluate 2r + 1 if r = 3

Back

7

Front

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

Back

10

Front

Evaluate 8a - b if a = 10 and b = 6

Back

74

Front

Evaluate the expression: 28/m when m = 4

Back

7

Front

What is a variable in algebra?

Back

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

Front

What is a constant in algebra?

Back

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

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.