Evaluating Algebraic Expressions (6th)

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols (like +, -, ×, ÷).

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

Simplify: 75 ÷ 5 × 9 – 9

Back

126

Front

Evaluate the expression when x = 8: 7(6 + 3 − x)

Back

7

Front

Evaluate 3x + 8 if x = 2

Back

14

Front

Evaluate a² - b² if a=4 and b=2

Back

12

Front

Evaluate the expression when x = 3: 2x² - 5

Back

13

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).

Front

What is a variable in algebra?

Back

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

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal.