An unforgettable day

Today, I finished my homework in the morning. When my mother saw it, I came over and said to me, "Zi Ni, play a game with you!" "Okay!" I agreed quickly.

Mother brought a piece of cardboard, and the center of the cardboard fixed a pointer that could be rotated with a nail. The cardboard is divided into 24 grids equally, with 1-24 numbers written in the grid. "Mom, what is the rules of the game? You are going to talk!" I said anxiously. "The rules of the game are very simple, that is: the pointer goes to the singular or double number, and the next number is added. If it is singular, it will win. If it is a double, you win." Mom said with a smile.

I saw the rules of the game so simple, I played more than ten times in a row, but every time I couldn't win my mother, my mother laughed. “Why is it always singular?” I asked my mother inexplicably. Mom said: "You think about it yourself!" So, I tried my best and finally reminded me of a formula that the teacher once said: odd + even = odd. I can understand this, if the pointer is transferred to a single number, then the next number must be even; if the pointer goes to the double number, then the next number is odd, so no matter the pointer goes to any one, add The numbers that are up are all odd. Mother is using this law to win.

In the world of mathematics, there are many wonderful laws. As long as we learn mathematics and make good use of mathematics, it is everywhere!

Fifth grade: Jiang Junjie Jiang Junjie