Once, while looking at the shop, Hua was solving a math problem. A lady came and wanted to buy cotton. When she asked Hua how much it was, he was completely absorbed in the problem and didn't hear what the other party said. After calculating the answer, he casually said a number. The lady thought he was talking about the price of cotton and screamed, "Why is it so expensive?" .

At this time, Hua knew that someone had come to buy cotton. When Hua sold cotton to a lady, he found that the toilet paper he used to calculate the problem was taken away by a lady. This made Hua desperate to catch up with the young lady, and he finally caught up with her. Hua said shyly, "aunt, please ... please give me back the toilet paper." The woman said angrily, "I paid for this, but." ...

Hua was in a hurry and said, "How about this! I paid for it. " When Hua reached for the money, the woman seemed to be moved by the child! He not only asked for money, but also returned the toilet paper to Hua. At this time, HuaCai slightly relieved. After returning home, I began to calculate math problems again.

Jingrun Chen

Chen Jingrun is a famous mathematician in China. He doesn't like going to the park and walking, but studying. When he studies, he often forgets to eat and sleep. One day, when Chen Jingrun was having lunch, he touched his head and found that his hair was too long. He should get a haircut quickly, otherwise people will think he is a big girl when they see him. So he left work and ran to the barber shop.

There are so many people in the barber shop that everyone cuts their hair next to each other. Chen Jingrun got brand number 38. He thought, it's still early for me to turn around. Time is so precious that I can't waste it. He hurried out of the barber shop, found a quiet place to sit down, then took out a small notebook from his pocket and recited new words in a foreign language. He recited it for a while and suddenly remembered that when he was reading a foreign language in the morning, there was one place he didn't understand. You must understand what you don't understand. This is Chen Jingrun's temper. He looked at his watch. It's only half past twelve. He thought: check in the library first, and then come back for a haircut. He stood up and left. Who knows, not long after he left, it was his turn to get a haircut. The barber shouted, "Number 38! Who is number thirty-eight? Come and get a haircut! " Think about it. Chen Jingrun is reading in the library. Can he hear the barber calling number 38? . 2. Gaussian

Gauss's most famous story is to calculate the value of 1+2+3+ ... elementary school+100. At that time, Gauss was in primary school, and the teacher had such a problem in class, so let everyone calculate. The teacher thought it would take at least 20 minutes to get the answer, and just wanted to have a rest, but Gauss said that his ass had been worked out before he could sit still. The teacher was surprised and asked him how to calculate. He said that we should start with1+100 =101,and 2+99= 10 1. . . Such a * * * has 50 10 1, so the result is 5050.

There is another story. When Gauss 19 years old, he originally planned to study law. As a result, he inadvertently solved a math problem in 2000, that is, he only used a ruler and compasses to divide the circumference equally. Gauss also proved that if and only if n = 2 (2 n)+ 1, the circumference can be equally divided by a ruler n. Since then, Gauss's interest in mathematics has greatly increased, and he has embarked on the road of mathematical research and become a great mathematician.