❤️MathFollowMeandPracticeeveryday💯🤔️Topictoday：Pan-balancePr

❤️Math Follow Me and Practice everyday 💯

🤔️Topic today：Pan-balance Problems天平⚖️問題

🔑Key words

▶️perfect balance完全平衡

▶️One block weighs as much as 2 balls.1個木塊和2個球一樣重

▶️consistent with一緻

▶️compass圓規，marble彈珠，coin硬币，cube小方塊