Evaluate 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 helps remember the order: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

Evaluate the expression: 12 - 4 x 2

Back

4

Front

What does b^2 represent when b = 3?

Back

b^2 means b multiplied by itself. When b = 3, b^2 = 3 x 3 = 9.

Front

Evaluate the expression: b^2 + 4 when b = 3

Back

13

Front

What does 3^2 mean?

Back

3^2 means 3 multiplied by itself, which is 3 x 3.

Front

Evaluate the expression: 4y if y = 3

Back

12

Front

Evaluate the expression: 2r + 1 if r = 3

Back

7

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 an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, x, ÷) that represents a value.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equal sign and represents a value, while an equation states that two expressions are equal.