Hi, I'm Rex! Let's hatch 20 essential 4th-grade math problems together — from place value to geometry. Ready, paleontologist?
📋 20 Questions
🦴 All Units
⏱️ Timed Quest
⏱️ 00:00
⭐ 0/20
🦖
Tap an answer for each question — I'll roar with confetti when you're right, and show you the fossil-proof explanation right away if you're not. Let's dig in!