Mathematical Expressions Flashcard

Front

What is a mathematical expression?

Back

A mathematical expression is a combination of numbers, variables, and operators (such as +, -, ×, ÷) that represents a value.

Front

What does it mean to evaluate an expression?

Back

Evaluating an expression means to calculate its value by performing the operations in the correct order.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that dictates 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 the purpose of parentheses in a mathematical expression?

Back

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

Front

How do you solve an expression with multiple operations?

Back

Follow the order of operations (PEMDAS) to solve the expression step by step.

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 equation and an expression?

Back

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

Front

How do you simplify an expression?

Back

To simplify an expression, combine like terms and perform any operations according to the order of operations.

Front

What does it mean to combine like terms?

Back

Combining like terms means to add or subtract terms that have the same variable raised to the same power.

Front

What is a numerical expression?

Back

A numerical expression is a mathematical phrase that includes numbers and operations but no variables.