Think of it this way: 1+5=6 (small square 1 or 5 branches), there are two ways to divide it.

2+4=6 (2 or 4 small squares), which can be divided into two types.

3+3=6 (3 small squares), scored.

Hope to adopt.

Even if it is the topic of the first grade, we should also train the method of classified thinking, so as to achieve "no weight and no leakage" and lay a solid foundation for future mathematics learning.