我家附近有一个小公园,妈妈经常在晚饭过后和我一起去那里散步。公园里有一座小桥,小桥的中间是台阶,我每次走上这座小桥时都喜欢数一数,从桥下走到桥上只要走10个台阶就行了。今天我们散步时又走到了这座小桥,妈妈看我走台阶时,一会儿走一个台阶,一会儿伸长腿连走两个台阶,便说:“好,就像你这样,如果上台阶时每步跨一个或两个台阶,当跨完第十个台阶时有多少种不同的走法?”我想,如果一步一步地排起来,肯定能找到一共有多少种不同的走法,但太烦琐 There is a small park near my home, and my mum often walks there with me after dinner. There is a small bridge in the park, the middle of the small bridge is a step, every time I embark on this small bridge like a few, from the bridge to go down the bridge as long as 10 steps on the line. Today, when we walked to this bridge, we saw that when I walked the stairs, I walked a step while I stretched my legs and walked two steps and said: “Well, just like you, if you go up the stairs How many different ways do you have to step across one or two steps per step when crossing the tenth step? ”" I think if I step by step, I’m sure I can find out how many different ways there are in total, Too cumbersome