Interesting math story 1: When Gauss, a math genius, was in elementary school, once after the teacher taught addition, because the teacher wanted to have a rest, he came up with a topic for the students to calculate. The theme is:
1+2+3+ .....+97+98+99+ 100 = ?
The teacher is thinking, now the children must start class! I used this as an excuse to go out, but Gauss stopped me! ! It turns out that Gauss has worked it out. Little friend, do you know how he did it?
Gauss told everyone how he worked it out: add 1 to 100, and add 100 to 1, adding two lines, that is:
1+2+3+4+ .....+96+97+98+99+ 100
100+99+98+97+96+ .....+4+3+2+ 1
= 10 1+ 10 1+ 10 1+ .....+ 10 1+ 10 1+ 10 1+ 10 1
* * * There are one hundred sums 10 1, but the formula is repeated twice, so the answer is equal to < 5050 & gt.
Since then, the learning process of Gauss Elementary School has already surpassed other students, which laid the foundation for his future mathematics and made him a mathematical genius!
Interesting math story 2: Where did three people stay in a hotel for one yuan? The price per person per day is 10 yuan, and everyone pays 10 yuan, giving the boss 30 yuan in total. Later, the boss gave them a discount of five yuan and asked the waiter to return it to them. As a result, the waiter embezzled two yuan, and the remaining three yuan was refunded one yuan each, that is to say, each person spent 9 yuan money. Three people spent a total of * * * 27 yuan, plus 2 yuan, a corrupt waiter, spent a total of * * * 29 yuan. Where did the dollar go?
Divide apples
There are five students in Xiaomi's family Xiaomi's father wants to entertain six children with apples, but there are only five apples at home. What shall we do? I have to cut the apple, but I can't cut it into pieces. Xiaomi's father wants each apple to be cut into three pieces at most. This has become another topic: divide five apples equally among six children, and each apple is not allowed to be cut into more than three pieces.
How did Xiaomi's father do it?
Interesting story 3 of mathematics: the origin of Arabic numerals: Arabic numerals 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 are internationally used numerals. This figure was not created by Arabs, but it can't erase the credit of Arabs. Arabic numerals originated from Indians and were gradually created by their ancestors in production practice.
In the 3rd century BC, a complete set of numbers appeared in India, but there were different writing styles in different places, among which Brahmanism was the typical one. Its uniqueness lies in that each number has a special symbol from 1 ~ 9, from which modern numbers are born. At that time,? 0? Has not yet appeared. Only in the Gupta era (300-500 years)? 0? . This produces a complete set of figures. This is the great contribution of the ancient Indian people to world culture.
Indian figures first spread to Sri Lanka, Myanmar, Cambodia and other countries. In the 7th and 8th centuries, with the rise of the Arab Empire across Asia, Africa and Europe, Arabs eagerly absorbed the advanced cultures of ancient Greece, Rome, India and other countries and translated a large number of their scientific works. In 77 1 year, Indian astronomer and traveler Maoka visited Baghdad, the capital of the Abbasid Dynasty of the Arab Empire (750- 1258), and presented an Indian astronomical work Sidan Tower to the then caliph Mansour (757-775), who translated it into Arabic and named it Sindh. There are many numbers in this book, so it's called? Indian numbers? , the original intention is? From India? .
Arabian mathematicians Hua Lazimi (about 780-850) and Haibosh first accepted Indian numerals and used them in astronomical tables. They gave up their 28 letters, revised and perfected them in practice, and introduced them to the west without reservation. At the beginning of the 9th century, Hua Lazimi published "India Counting Algorithm", and expounded Indian numbers and their application methods.
Indian numerals replaced the long and clumsy Roman numerals, which spread in Europe and were opposed by some Christians, but proved to be better than Roman numerals in practice. 1202 The Calculation Book published by Leonardo in Italy marked the beginning of the use of Indian numerals in Europe. Chapter *** 15 of the book begins with the following words:? The nine numbers in India are:? 9、8、7、6、5、4、3、2、 1? Based on these nine numbers and the symbol that Arabs call sifr (zero)? 0? Any number can be expressed. ?
/kloc-In the 4th century, printing in China spread to Europe, which accelerated the popularization and application of Indian numerals in Europe and was gradually adopted by Europeans.