Make adding decimals engaging and fun with this low-prep, high-interest math activity! Students will love solving problems as they work to unlock a secret code—turning practice into a game-like experience. This resource is perfect for math centers, independent practice, review, or sub plans, while giving you meaningful insight into student understanding. 🔐 HOW IT WORKS Students solve each adding decimals problem and select the correct answer. Each correct answer reveals a letter. When all pr