Question

Evaluate the expression. $$4+9-1$$

Short answer

The answer to the expression 4 + 9 - 1 is 12.

Step-by-step solution

Perform the Addition

The first step is to add 4 and 9. Doing this will result in the number 13.

Perform the Subtraction

Then, the next step is to subtract 1 from the result of the addition step. So, we take the 13 and subtract 1 from it, which gives us 12.

Key concepts

Addition and Subtraction

Understanding basic arithmetic, specifically addition and subtraction, is fundamental in the world of math. When evaluating expressions like \(4+9-1\), think of the process as combining and taking away quantities. Addition involves bringing together numbers to find a total sum, while subtraction is about taking one number away from another to find the remaining amount.

Here's how to approach it: begin by identifying all the parts of the expression. In our case, we have the numbers 4 and 9 which we need to combine (add), and then we have the number 1 which we need to take away (subtract) from the result of that addition. Always perform these operations one step at a time to avoid confusion and to ensure your calculations remain accurate. This sequential method leads to precise and well-structured solutions.

Basic Algebra

While the expression \(4+9-1\) may not seem to be 'algebra' in the strict sense, the principles of basic algebra apply when simplifying expressions. In algebra, we often deal with unknown variables, but the operations themselves - like addition and subtraction - are identical. Simplifying an algebraic expression involves combining like terms and applying arithmetic operations in the correct order, known as the order of operations or PEMDAS/BODMAS.

In our case, the 'like terms' are the numerical constants that we can easily calculate. Practicing with simple arithmetic operations lays the groundwork for understanding more complex algebraic manipulations, as the same procedural steps are followed whether the terms are known numbers or variables.

Arithmetic Operations

Arithmetic forms the backbone of all higher mathematical concepts. It encompasses the operations of addition, subtraction, multiplication, and division. To effectively evaluate expressions, you must be proficient in these fundamental operations. They are the tools that allow us to find the value of expressions, regardless of their complexity.

When looking at an expression like \(4+9-1\), it's essential to perform each operation with mindful precision. We often simplify our expression in stages, going left to right as dictated by the standard arithmetic priorities. This practice will serve you well as arithmetic operations are not only crucial in basic math but also in complex problem-solving scenarios across different areas of mathematics and real-world applications.