2. Still Gaussian. In primary school, in order to punish students, teachers asked them to calculate 1 and add it to 100. When everyone else wanted to add it, Gauss worked it out quickly by using the method that the beginning and end homesickness were equal to 10 1.
3. Von Carmen painted on the ground for fun when he was a child. His father asked him what 12X 12 was, and von Carmen gave the answer without thinking. His father asked how much 33X56 was, but he gave the answer without thinking. Finally, his father was a little panicked and asked what 256X 123 was equal to. Von Kamen thought about it a little before giving it.
There seem to be more than 20 words. You should make it smaller.
When I was in middle school, in a math class, the teacher gave the students a famous question: "There is a number, three, and two; 5 digits, 5 numbers, and the remaining 3; There are seven places in seven, and there are two left. What's the date? " When everyone was thinking, Hua stood up and said, "23". His answer surprised the teacher and won his praise.
On one occasion, Chen Jingrun went for a haircut. He is number 38. It's too early to cut his hair! So he went to the library and forgot to get a haircut. Brand 38 is still in his pocket!
Goldbach, a German mathematician, was born in 1690 and was elected as an academician of the Academy of Sciences in Petersburg, Russia from 1725. In Petersburg, Goldbach met Euler, a great mathematician. They have been communicating for more than 30 years. He has a famous conjecture, which was put forward in correspondence with Euler. This has become a popular story in the history of mathematics.