TEKS 5.4B: Equations & Expressions

Front

What is an expression in mathematics?

Back

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

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 and performing the operations.

Front

What is the difference between an equation and an expression?

Back

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

Front

What is the order of operations in mathematics?

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

How do you write an expression for a total amount of money earned?

Back

You can write an expression like: Total = Starting Amount + (Hourly Rate × Number of Hours Worked).

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

How do you represent sharing equally in an equation?

Back

You can represent sharing equally by using division, such as: Total Cookies ÷ Number of People = Cookies per Person.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form by combining like terms and performing operations.

Front

What is a mathematical operation?

Back

A mathematical operation is a calculation that combines numbers in a specific way, such as addition, subtraction, multiplication, or division.

Front

How do you find the remaining quantity after using some?

Back

You can find the remaining quantity by subtracting the amount used from the total amount, such as: Remaining = Total - Used.