大家知道 $\sqrt{2}$ 是无理数，而无理数是无限不循环小数，因此 $\sqrt{2}$ 的小数部分我们不可能全部地写出来，于是小明用 $\sqrt{2}$ ﹣1来表示 $\sqrt{2}$ 的小数部分，你同意小明的表示方法吗？

事实上，小明的表示方法是有道理，因为 $\sqrt{2}$ 的整数部分是1，将这个数减去其整数部分，差就是小数部分．

又例如：

∵ $\sqrt{4}$ ＜ $\sqrt{7}$ ＜ $\sqrt{9}$ ，即2＜ $\sqrt{7}$ ＜3，

∴ $\sqrt{7}$ 的整数部分为2，小数部分为（ $\sqrt{7}$ ﹣2）．

请解答：

    On a sunny day, Small Bear went boating with Papa. They bought hats first. Papa got a small hat for his big head. Small Bear got a big hat for his small head. Papa's hat was too small.

    Small Bear's hat was too big! They exchanged(交换) hats. Just right! Then, they came to the boat.  It had two seats. Papa sat on the small seat. Small Bear sat on the big seat. Papa Bear was too heavy. Small Bear was too light. They exchanged seats. Just right! After boating, they had lunch nearby. Papa got a small bowl. Small Bear got a big bowl. The food in the small bowl was too little for Papa. And the food in the big bowl was too much for Small Bear. They exchanged bowls. What a good meal!