Arithmetic
The foundation of all mathematics. Fractions, decimals, percentages, and the number system , the concepts that underpin everything from everyday calculations to advanced math.
Fractions Explained
What fractions mean, how to simplify them, and how to add, subtract, multiply, and divide them , all with the intuition behind each rule.
Decimals Explained
Place value, converting between fractions and decimals, and how to perform operations with decimals confidently.
What is a Percentage?
What percent means, how to calculate percentage of a number, and how fractions, decimals, and percentages all connect.
Factors and Multiples
What factors and multiples are, how to find GCF and LCM, and why they matter for working with fractions.
Negative Numbers
What negative numbers mean, how to add, subtract, multiply, and divide them, and how to avoid the most common sign errors.
Why Arithmetic Matters
Arithmetic is the language of numbers. Every subject in mathematics , algebra, statistics, calculus , relies on a solid understanding of fractions, decimals, percentages, and basic number sense. These lessons are written for anyone who wants to fill gaps in their foundational knowledge, whether you're a student, a parent helping with homework, or an adult who wants to feel more confident with numbers.