Modular arithmetic is an important concept in number theory and algebra, often described as “clock arithmetic,” where numbers wrap around after reaching a certain value called the modulus. For integers $a$ and $b$ with modulus $n$, we write: $$ a \equiv b \ (\text{mod } n) $$ which means $a$ and $b$ have the same remainder when divided by $n$.
This Modular Arithmetic Worksheet provides clear examples, guided exercises, and practice problems to help students understand addition, subtraction, and multiplication modulo $n$. By completing this worksheet, learners will strengthen their skills in modular calculations, improve number sense, and gain confidence in solving problems related to congruences and remainders.