https://i.imgur.com/Uc91Cyt.jpg
又是算術小教室唷
一
https://i.imgur.com/bvpUX9j.jpg
https://i.imgur.com/VpAs6w5.jpg
二
https://i.imgur.com/B5GaWxl.jpg
三
https://i.imgur.com/ORSrGfP.jpg
四
https://i.imgur.com/YnE54nm.jpg
五*2
https://i.imgur.com/i4hr6mp.jpg
六
https://i.imgur.com/Rckqe1v.jpg
87
https://i.imgur.com/Qdre75d.jpg
https://i.imgur.com/ITW3roj.jpg