Problem 48 - Elementary Algebra

Question

Find the value of each of the following expressions. $$ 0-(-1) $$

Step-by-Step Solution

Answer

Question: Simplify the following expression: 0 - (-1) Answer: 1

Step 1: Identify the expression

The given expression is: $$ 0 - (-1) $$

Step 2: Apply the double negative rule

When you see a double negative, you can apply the rule that two negatives make a positive. So we can rewrite the expression as: $$ 0 + 1 $$

Step 3: Simplify the expression

The expression can be further simplified as: $$ 1 $$ The value of the given expression is 1.

Key Concepts

Simplifying Algebraic Expressions

Simplifying algebraic expressions is a fundamental step in understanding algebra. The goal is to make expressions as easy as possible to work with. This often involves combining like terms, which are terms that have the same variables and exponents, and applying basic arithmetic operations.

For example, if we have the expression \(2x + 3 - x + 1\), simplifying would involve combining the \(x\)-terms and the constant numbers separately to get \(2x - x + 3 + 1\), which simplifies further to \(x + 4\). This skill is crucial as you move on to more complex expressions and equations. It allows for clearer problem-solving and easier understanding of the relationships between variables.

Negative Number Operations

Handling negative numbers in algebra can often be tricky. Understanding negative number operations is essential for solving algebraic expressions accurately. When dealing with negative numbers, remember that subtracting a negative is like adding a positive, and multiplying or dividing two negatives results in a positive.

Take the expression from our exercise, \(0 - (-1)\). Applying these rules, we turn the subtraction of a negative into the addition of a positive, resulting in \(0 + 1\), which simplifies to 1. It's essential to grasp these operations to avoid errors in calculations, as they are the foundation of much more complex problem-solving in algebra.

Basic Algebra Rules

There are several basic algebra rules that students need to get acquainted with to ease their way into more advanced topics. These rules include the distributive property, the commutative and associative properties of addition and multiplication, and the double negative rule.

The double negative rule, as seen in our exercise, tells us that two negative signs cancel each other out, making a positive. This rule is crucial because it helps simplify expressions that might otherwise seem complex. For example, \(a - (-b)\) would simplify to \(a + b\), making it easier to understand and solve. Mastering these basic rules will provide a solid foundation for tackling algebraic challenges with confidence.