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Number Sum

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Feb 9, 2026
6:19

Number Sum Gameplay Guide | MathNook Addition Logic Puzzle Stuck on a tricky level in Number Sum? Watch this complete overview to master the game! Number Sum is an addictive logic addition puzzle game where you select the right combinations of numbers to match target totals and clear the board. It's all about strategy, logic, and sharp addition skills! In this video, you'll learn: How to use Pen Mode (circle numbers you want to keep) and Eraser Mode (remove the ones you don't) Basic controls and UI overview Strategies for solving easy levels What those superscripts (running totals) mean and how to use them How to view the hidden gameboard after "Level Complete" Pro tips for tackling advanced levels with colored areas Whether you're practicing addition, training your brain, or just love number puzzles, Number Sum delivers fun, no-time-limit challenges perfect for kids, students, and adults alike! 🎮 Play Number Sum now: https://www.mathnook.com/math/number-sum.html (Or find it in the MathNook addition games section!) Timestamps: 0:45 - How to Reset your Progress 2:10 - UI Overview: Pen vs. Eraser Mode 2:47 - Solving a Basic Level & Strategies 3:50 - Superscript Explanation 4:20 - Viewing the Hidden Gameboard 6:18 - Advanced Levels with Colored Areas If this guide helped you crack those tough sums, smash that 👍 LIKE button! Subscribe for more MathNook walkthroughs, tips, and math game overviews → https://www.youtube.com/@YourChannelName

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Number Sum | NatokHD