Basic Concepts
In a nutshell: Master the basics of numbers and operations for everyday math success.
## Understanding Numbers and Operations
Arithmetic is the foundation of all math! You’ll learn how to work with whole numbers, fractions, decimals, and percentages. This includes addition, subtraction, multiplication, and division—plus how to handle negative numbers and order of operations.
### Key Concepts
- Whole numbers, fractions, and decimals
- Converting between fractions, decimals, and percentages
- Using the order of operations (\(PEMDAS\))
- Positive and negative numbers
### Why It Matters
Arithmetic is everywhere: from shopping and budgeting to cooking and sports. Being comfortable with numbers helps you make smarter choices every day.
Examples
- Calculate 3/4 of 20 to find out how many slices of pizza you get if there are 20 slices and you eat three-fourths.
- Convert 0.75 to a percentage so you know that scoring 0.75 on a quiz means you got 75%.
Key terms
- Order of Operations
- The rules for which calculations come first in an expression (Parentheses, Exponents, Multiplication/Division, Addition/Subtraction).
- Fraction
- A way to show parts of a whole, written as one number over another.