One day, my mother took me to the vegetable market to buy food. There are many dishes, and all kinds of vegetables are dazzling. Unconsciously, we came to the place where we bought tomatoes. Red tomatoes are really attractive! I said, "Mom, let's buy some tomatoes." Mom said, "OK, but you have to answer my question." 4 kg of tomatoes, * * * 5 yuan 6 jiao, 1 kg of tomatoes? "I thought about it and told my mother that it was 1 40 yuan. Mother asked me how I worked it out. I said to my mother, "Half of 4 kilograms is 2 kilograms, half of 5 yuan's 6 horns is 8 horns of 2 yuan, half of 2 kilograms is 1 kg, and half of 2 yuan's 8 horns is 4 horns of 1 yuan. "My mother praised me for being so smart.

Once, several of our good partners were playing the game of "grabbing the red flag". The rules of the game are blindfolded. First walk 5 meters to the left, then walk 5 meters, then walk 5 meters to the right, then walk 5 meters to the right, and then walk 5 meters to win the red flag. Several of our good friends had a good time, and it suddenly occurred to us that this game is not just a mathematical problem of route and direction.

I know that mathematics is inseparable from life. No matter what you do or play, there will be math problems with you. There is mathematics everywhere in life.

Instructor: Song Xiurui