Evaluating Expressions

Front

Evaluate the expression: Let g = 3, h = 9. What is 4h + 2g + 4?

Back

46

Front

Evaluate the expression: (-2)^2 - (-5)^2. What is the result?

Back

-21

Front

Evaluate the expression: If a = 2 and b = 8, what is 6 + 7b - 3a?

Back

56

Front

Evaluate the expression: When a = 15, what is 2(a - 5) + 2?

Back

22

Front

Evaluate the expression: 3r + 2e; if r = 3 and e = 2, what is the result?

Back

13

Front

Define 'expression' in mathematics.

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

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 evaluate an expression?

Back

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

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 the difference between an expression and an equation?

Back

An expression is a mathematical phrase that represents a value, while an equation states that two expressions are equal.