2+2=4

Correct. If you’d like, I can turn this into a quick review or practice. Options:

• Quick notes: In binary, 2 (10₂) + 2 (10₂) = 4 (100₂). Addition is commutative and associative.
• Practice problems: 7+6, 9+5, 12−4, 15−7, 0+8. Want me to solve them step by step?
• Different angles: show how to prove 2+2=4 from Peano axioms, or demonstrate with a number line or base-n examples.

Tell me what you’d prefer or what topic you’re studying next.