Addition and Subtraction is a browser extension developed by biplobsd11 that allows users to practice simple addition and subtraction expressions. This extension functions like a quiz, helping users improve their math skills in a fun and interactive way.

With Addition and Subtraction, users can enjoy the following features:

• Quick random expressions: The extension generates random addition and subtraction expressions for users to solve, ensuring a varied and challenging experience.
• Easy, Medium, Hard, and Custom modes: Users can choose the difficulty level that best suits their skill level or customize the settings to create a personalized learning experience.
• Addition, Subtraction, or random operations: Users can focus on practicing either addition or subtraction or opt for a mix of both by selecting the random operations mode.
• Cloud-based user settings: Addition and Subtraction allows users to save their settings to the cloud, making them accessible from other devices. This feature ensures that users can continue their practice seamlessly across multiple platforms.
• Leaderboard: Users can track their progress and compete with others through the leaderboard feature, adding a competitive element to the learning process.
• Dark/Light theme: The extension offers a choice between a dark and light theme, allowing users to customize their visual experience.
• Open-source: Addition and Subtraction is an open-source project, providing transparency and encouraging community contributions.