Analysis: Climb up 2 knots and down 1 knots, which means that you can only climb up 1 knots at a time.

So the little monkey needs to climb four times to climb to the top of the pole.

Analysis method: Analysis method is a thinking method that starts from the problem sought in the problem and gradually finds out the known conditions necessary to solve the problem.

In the process of arithmetic development of various civilizations:

The generation of multiplication operation is a very important step. A civilization can successfully develop counting methods and addition and subtraction operations, but it is not so easy to create simple and feasible multiplication methods.

The vertical calculation of multiplication seems simple, but it is necessary to master the formula table of 99 multiplication in advance; Considering this, this vertical calculation is not perfect.