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Subtraction is one of the basic arithmetic operations you will encounter often when evaluating expressions. In subtraction, you take away one quantity from another. For example, in the expression \(10 - 5\), you subtract 5 from 10.
This means you start with 10 and remove 5 from it. What's left is 5.
You can think of subtraction as counting backwards on a number line. If you start at 10 and count backwards 5 steps, you arrive at 5. Subtraction helps us find the difference between two numbers.
It’s important to always subtract the smaller number from the larger number to get a positive result unless otherwise specified. This is especially useful when dealing with absolute values.

Evaluating an expression means finding out what value the expression is equal to. Let's break down the process of evaluating expressions. First, you need to look at what's inside the expression.
In our example, the expression is \(10-5\). Once you identify the expression, perform any operations inside it.
If there are multiple operations, follow the order of operations, often remembered as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).
After performing these operations, you get a single value, which is the evaluated result of the expression.

Basic arithmetic includes addition, subtraction, multiplication, and division. These are fundamental skills in mathematics that are used to solve various problems.
When learning basic arithmetic, it's important to remember:

• Addition combines two numbers to get a sum.
• Subtraction finds the difference between two numbers.
• Multiplication finds the total of one number taken multiple times.
• Division splits a number into equal parts.

In the given problem, we performed subtraction: \(10 - 5\), which is basic arithmetic.
Mastering these basic operations is crucial because they form the building blocks for more complex math concepts. Whether you're working on absolute values, evaluating expressions, or solving equations, having a solid understanding of basic arithmetic will make it much easier.