ISEE Lower Level Quantitative Reasoning Lessons & Study Guide

## Understanding Numbers Numbers are everywhere! From counting your toys to tracking scores in a game, numbers help us make sense of the world. In this section, you'll learn about whole numbers, fractions, decimals, and how to use them in fun and practical ways. ### Operations with Numbers Operations are actions you can perform with numbers, like adding, subtracting, multiplying, and dividing. Mastering these basics helps you solve all kinds of puzzles and problems. - **Addition** is combining numbers: \( 4 + 3 = 7 \) - **Subtraction** is taking away: \( 7 - 2 = 5 \) - **Multiplication** is repeated addition: \( 3 \times 4 = 12 \) - **Division** is splitting into equal parts: \( 12 \div 3 = 4 \) ### Fractions and Decimals Sometimes, things aren't whole. That's where fractions (like \( \frac{1}{2} \)) and decimals (like 0.5) come in. They help us talk about parts of things, like half a pizza! ### When Will You Use This? Whether you’re figuring out how much money you need for a toy, splitting a snack with friends, or measuring ingredients for cookies, numbers and operations are your best friends.