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一天,小猴跟着妈妈来到鱼塘边,猴妈妈说:“咱们要在这正方形的鱼塘边栽上树。”小猴问:“怎么栽呢?”“每条边上栽9棵,其中4个角上要各栽一
One day, the monkey followed the mother to the pond. The monkey mother said: ”Let's planted the tree beside the square fish pond.“ ”Monkey asked:“ How to plant? ”" Each side On the planted 9, four of which should be planted one