Math Review - 4.OA

Front

What does 4.OA stand for in math?

Back

4.OA stands for 'Operations and Algebraic Thinking', a domain in the Common Core State Standards for Mathematics for Grade 4.

Front

What is an expression in math?

Back

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

Front

What is the difference between an expression and an equation?

Back

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

Front

What is a variable?

Back

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

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting numbers for the variables.

Front

What is the order of operations?

Back

The order of operations is the rules that determine the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). This is often remembered by the acronym PEMDAS.

Front

What is a factor in math?

Back

A factor is a number that divides another number evenly without leaving a remainder.

Front

What is a multiple in math?

Back

A multiple is the result of multiplying a number by an integer.

Front

How do you find the greatest common factor (GCF) of two numbers?

Back

To find the GCF, list the factors of each number and identify the largest factor that appears in both lists.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.