Combine · Remove · Build
+25 XP on completionAddition means combining quantities. If you have 14 Blender objects in one scene and 23 in another scene, addition tells you how many objects you have total. Builders use addition whenever they combine parts into something bigger.
Subtraction means taking away or finding the difference. If your game character has 100 health points and takes 37 damage, subtraction tells you how much health remains. It is how builders track what changed.
Solve these three builder-number problems. Keep the setup clean, then run the numbers.
Problem 1: 247 + 189 = ?
Problem 2: 500 - 163 = ?
Problem 3: 1,024 + 768 = ?
You just ran the numbers. That's what builders do.