Today we use 3+ 1=4 to tell a math story. Xiaoming said I could do it. One day, my father and I went fishing in the pond. Dad caught three small fish. I waited a long time to catch a small fish. Dad said.

Xiao Ming, do the math. We caught some small fish together. This beats me, Xiao Ming said, using 3+ 1=4. 3+ 1=4 can tell many math stories.