Evaluating Expressions

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. The acronym PEMDAS is often used: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

Evaluate the expression: 3 + 27 ÷ (-3)

Back

-6

Front

What is the formula for the difference of squares?

Back

The difference of squares is expressed as a² - b² = (a - b)(a + b).

Front

Evaluate a² - b² when a = 4 and b = -2

Back

12

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 and performing the operations.

Front

Evaluate the expression: bc + 5a when a = 3, b = 4, and c = -6

Back

-9

Front

What is the result of -14 ÷ 2 – 15?

Back

-22

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents a number that can change or vary.

Front

What is the value of the expression 5x when x = 2?

Back

10

Front

What is the significance of parentheses in mathematical expressions?

Back

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