Basic Concepts
In a nutshell: Mastering the basics of numbers and operations is the foundation for all math skills.
## Understanding Numbers
Numbers are everywhere! From counting apples to calculating the score in your favorite game, numbers help us make sense of the world. In the SSAT Upper Level Quantitative section, you'll face questions about integers, fractions, decimals, and more.
### Types of Numbers
- **Integers**: Whole numbers (positive, negative, and zero)
- **Fractions**: Parts of a whole, like \( \frac{3}{4} \)
- **Decimals**: Numbers with a decimal point, like 2.75
- **Percentages**: Parts per hundred, like 50%
### Key Operations
The main operations you need to master are:
- Addition (+)
- Subtraction (−)
- Multiplication (×)
- Division (÷)
Understanding how to combine numbers using these operations is fundamental for solving more complex problems.
## Real-World Applications
Numbers and operations are essential for everything from shopping (calculating change) to baking (measuring ingredients).
Examples
- Solving \( 15 + 6 \) to find out how many books are in two stacks.
- Dividing a pizza into 8 slices and sharing it among 4 friends.
Key terms
- Integer
- A whole number; can be positive, negative, or zero.
- Fraction
- A number that represents part of a whole.
- Decimal
- A number that uses a decimal point to show a value smaller than one.
- Percentage
- A way of expressing a number as a fraction of 100.