In 46 BC, Julius Caesar, commander-in-chief of Rome, specified the calendar. Because he was born in July, in order to show his greatness, he decided to change July to "Julian month", and all single months were stipulated as 3 1 day, and bimonthly was 30 days. In this way, there is one more day in a year. February was the month when prisoners were executed in ancient Rome. In order to reduce the number of people executed, 1 day was reduced in February to 29 days.

Story 2

The animal school held a children's song competition, with the elephant teacher as the referee. The little monkey raised his hand first and began to recite: "I can calculate carry addition, and the digits can only be added if they are aligned." The number of digits should be aligned with the number of digits. When the number of digits exceeds ten, the number of digits should be advanced to ten. Add ten and one to count quickly and accurately. "

As soon as the little monkey finished speaking, the puppy began to recite again: "abdication and subtraction are not difficult, just align the numbers." If the single digits are small enough, ten people can borrow one. If ten people return, one will be ten, and if they return, one will be missing. How to reduce ten digits, ten digits will be reduced again and again. "

Everyone applauded their wonderful performance. Teacher elephant said, "Their children's songs make us understand that they both deserve to win the championship, right?" "Everyone agreed and congratulated them.

Story 3

Math Story 4

Archimedes has many stories, the most famous of which is the story of discovering Archimedes' principle in the bath.

The king made a golden crown. He suspected that the craftsman had stolen some gold with silver, so he asked Archimedes to identify whether it was made of pure gold and not to damage the crown. Archimedes thought hard about the crown all day. One day, Archimedes went to the bathroom to take a bath. He went into the bath tub. When he immersed himself in the bath bucket, some water overflowed from the side of the bucket. Archimedes saw this phenomenon and crackled in his mind. "I found it!"

Archimedes took a gold nugget with the same weight and a silver nugget with the same weight and put them in containers filled with water respectively. He found that silver blocks can discharge more water. It was Archimedes who took a gold nugget as heavy as a crown and put it in a container full of water to measure the amount of water discharged. Then put the crown in a container filled with water to see if the amount of water discharged is the same, and the problem will be solved. With further research, Archimedes principle, the most important cornerstone of fluid mechanics, was born.

Story 4

Math stories 1

Pascal, a great French mathematician and physicist, not only liked to ask why when he was a child, but also liked to delve into it by himself to find the answer to the question. Once, Pascal was playing outside the kitchen and heard the chef jingle the dishes. This voice caught Pascal's attention.

He thought, if the knock made a sound, why didn't the sound disappear as soon as the knife left the plate? He did the experiment by himself. He found that the sound continued after knocking on the plate, but as long as he pressed the edge of the plate with his hand, the sound stopped immediately. Pascal was pleased to find that the most important thing in the original sound was vibration, not percussion. The blow has stopped. As long as the vibration doesn't stop, it can still make a sound.

In this way, Pascal discovered the principle of acoustic vibration at the age of 1 1 and began scientific exploration. He was able to publish a mathematical paper at the age of 16, developed the world's first mechanical computer at the age of 22, and completed the famous vacuum experiment at the age of 24, all of which were inseparable from his love for the brain since childhood.