Also called "digital." Used to count symbols. Arabic numerals are the most commonly used is 0,1,2,3,4,5,6,7,8,9. Chinese characters commonly used figure of one, two, three, four, five, six, seven, eight, nine, ten. In addition, Roman numerals and so on.
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shù zì
Numerals; that the number of symbols
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No. 3
Number of words. "Appreciative Ren Fang Biography": "﹝ ﹞ Wang Jian is from writing, so that point is Fang, Fang figures due to be." Wengyuan Long Song "Swiss Dragons" word: "Yan Wang array, the number of people commission to write dark Cloud difficult to recognize. "
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No. 4
That the number of words. Chinese characters are lowercase uppercase number two, '12345678 90' and others are lower case, 'One II triplet wantonly Wu Lu Qiba nine hundred' and so is the capital.
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No. 5
That the number of symbols. Such as Arabic, Suzhou numerals.
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No. 6
Number; number. North Korea Screen "African Night will be slaves and the slave coast": "Black Africa lost nearly 200 million people, this is really a matter of bristle number."
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"Digital" explanation
“数字”的解释
One explanation (with connections: a): Indicates the number of text. Explains two: represents the number of symbols. Explain the three: the number meant. Explain the four: that ratio (ratio, etc.)
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Arabic numerals origin
Arabic numerals are not Arabs inventions, but originated in ancient India, and later mastered the Arabs, improvements, and spread to the West, the West put these numbers are called Arabic numerals. After repeated the baseless assertion, all over the world agree that this argument. Arabic is the ancient Indian practice in the production and gradually created. Need to calculate the moon and stars in the ancient Indian run, urban design and planning construction needs, conduct ritual, so math is produced. Around 3000 BC, the Indus Valley residents figure is more advanced, and the use of decimal calculations. To the third century BC, India appeared _set_ of numbers, but the wording is not entirely consistent in all regions, the most representative is the Brahmin style: This group of figures is more commonly used at the time. It is characterized from "1" to "9" Each number has a special character. This figure is _set_ by the modern digital evolved. In this _set_ of figures, the "0" (zero) has not yet appeared symbol. "0" this figure is to the Gupta dynasty (AD 320-550) dynasties before appearing. Finished fourth century mathematics book "Sun Manual", has been using the "0" symbol, was just solid dots "*." Later, the small dots evolved into a small circle "0." Thus, a _set_ from "1" to "0" will tend to improve the figures. This is a great contribution to the ancient Indian culture of the people of the world. India figures first reached Sri Lanka, Burma, Cambodia, India and other neighboring countries. The rise across three continents, Africa and Europe Arab Empire AD seven to eight centuries. Arab empire expanded to around the same time, the Arabs also learn a wide range of advanced culture of ancient Greece, Rome, India and other countries, a large number of scientific works translated in these countries. In AD 771, a trip to India after a long journey home hair card, came the Arab Abbasid Empire Baghdad. Mao card to carry an Indian astronomy book, "West Hanta", dedicated to the then caliph (king) Mansour. Mansour very cherished this book and ordered it to be translated into Arabic translator. Translation of the name "letter Dexin De." This application works a lot of Indian numerals. Thus, the Indian figure will be absorbed and adopted by the Arabs. Since then, the Arabs gradually abandoned their original calculation symbols as 28 letters, digits and widely used in India, and also figures to be revised and improved in India, in practice, to make it easier to write. Arabs mastered the Indian figures, quickly took it introduced to the Europeans. Medieval Europeans used when the count is lengthy Roman numerals, very inconvenient. Therefore, a simple and clear number one in India to Europe, they were welcomed by the Europeans. However, at the start of India's figures to replace Roman numerals, but was strongly opposed to the Christian church, because it is knowledge from "heretic". But proved far superior to Roman numerals India figures. 1202, Italy published a book of this important mathematical "calculations book", the book is widely used by the Arabs to improve Indian figures, it marks the beginning of a new figure used in Europe. This book is divided into fifteen chapters. In the beginning of the first chapter, wrote: "The number nine is the Indian word '9, 8,7,6,5,4,3,2,1 ', with nine figures, and the Arabs called the' zero 'mark '0 ', any number can be represented. " As the years passed, the fourteenth century, Chinese printing spread to Europe, but also accelerate the promotion and application of the Indian figures in Europe. Indian digital gradually adopted for the whole European. Westerners accepted by Arab figures came in India, but they were ignored the ancient Indians, but only considered the merits of the Arabs, so called Arabic numerals, the wrong call has spread so far.
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For Arabic Numerals
(With connector: Arabic numerals) Figures, is both strange, and familiar terms. It is from 0 to 9 and 10 letters. Figures not only include counting, there is a wealth of philosophical connotations. 1: can be seen as the number "1", a stick, a crutch, an upright gun, a candle, a one-dimensional space ...... 2: can be seen as the number "2", a horse, a man kneeling down, a steep slope, a slide, a goose ...... 3: can be seen as the number "3", two fingers, breast, crossed eyes, tree branches, the backwards w ...... 4: can be seen as the number "4", a squat man, a small sailboat, a small red flag, knife ...... 5: can be seen as the number "5", belly, little ass, notes ...... 6: can be seen as the number "6", tadpoles, a head and an arm sticking out of the people ...... 7: can be seen as the number "7", crutches, small table, bench, fork in the road, "D"-shaped objects, sickle ...... 8: can be seen as the number "8", mathematical symbols "∞", peanuts, rings, snowman ...... 9: can be seen as "9", a person sitting against, small buds ...... 0: can be seen as a digital "0", the person chubby, round "○", sole, feet, two-dimensional space, the thin face, egg ...... Figures in the complex range of real and imaginary numbers, real numbers can be divided into rational and irrational numbers or integers and decimals into fractions can any rational form.
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有关古罗马数字
In the decimal number 37, which indicates the value 30 (decimal);
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Decimal fraction of rational
Any rational finite decimal or fractional are unlimited with a recurring decimal. Limited Needless to say, for example 0.354567 = (0.354567 / 1) and then the numerator and denominator can simultaneously take on certain multiples of 10. As for infinite recurring decimal, first find its circulation section (ie, the cycle that several figures), and then expand it to a geometric sequence, find the first n items and, taking the limit, simplification. For example: 0.333333 ...... Cycle Day 3 Then 0.3 = 3 * 10 ^ (-1) +3 * 10 ^ (-2) + ...... +3 ^ 10 (-n) + ...... First n items and is: 3 * 0.1 (1 - (0.1) ^ (n)) / (1-0.1) When n tends to infinity (0.1) ^ (n) = 0 Therefore 0.3333 ...... = 0.3/0.9 = 1/3 Note: the significance of m m ^ n ^ n.
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Digital generation
Earliest human tools is used to count the fingers and toes, but they only represent numbers less than 20. When the number of many, the most primitive mind with respect to the number of pebbles. Gradually, people invented a method to count a dozen knots, or portray count on the skins, trees, stones. China is to count the ancient wood, a stick made of bamboo or bone, called the chip count. These counting methods and count slowly transformed into a symbol of the earliest number sign (digital). Today, the world standard for digital use Arabic numerals.
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数字的历史
Two hundred years later, the Arab unity in the Islamic conquest of the surrounding peoples, from the establishment of the East India, West Africa, to Spain from Sarah Sun Dadi country. Later, the Islamic empire split into East and West two countries. Since these two countries generations kings reward culture and art, so the capitals of the two countries is very prosperous, which is especially bustling East are - Baghdad, west to the Greek culture, the East Indian culture are brought together to come here. Arabs understand the two cultures to digest, thus creating a unique Arab culture.
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Idioms containing numbers
A: a clean break with the lead single-minded seriousness nothing coherent rapid annual one mind at a glance nothing Yiwuyishi Two (two): one mind clean break three thousand three hundred twenty-two Three: three thousand three hundred twenty-two superhuman injunctions half-hearted should happen in threes Four: divided, all sides, embattled Five: injunctions colorful colorful colorful Yiwuyishi Six: superhuman Liushenwuzhu Seven: uneasiness rushes Eight: uneasiness rushes Nine: Nine Lives nine cattle tigers drop in the bucket Ten: Urgent perfect Yiwuyishi One thousand: one thousand million millions of soldiers and thousands of miles all the way to rapid supremely moment riddled generations Wan: colorful unite foolproof Wanmabenteng Vientiane update silence lighted Pengchengwanli rebirth in case the abyss -------------------------------------------------- -------------------------------------------------- --------- A calculation of the characteristic data to binary numbers (zero and one), respectively. Depends on its relationship with some special numbers is represented. If ... 16,8,4,2,1 so on. Example: 9 binary expression is 1001. Because it has an 8 and a 1.
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Sort numbers
A ten millions one hundred thousand million billion trillion 1000000000000000 one billion ten billion Shizhao Fast Gigabit Jing Jing one thousand one hundred ten Jing Jing Gai Gai one thousand one hundred ten Gai Gai ten trillion trillion trillion one hundred one thousand one hundred trillion grass ten grass grass one thousand grass? Ten Baiqian Stream Stream one thousand one hundred ten Stream Stream being one hundred ten Zhengqian being positive ......
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百科辞典
One kind of representation than words count more modern methods, and establish notation
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English Expression
n.: cipher, digit, digital, digits, number, numeral, three dimensional, incremental (digital) recorder, figure, amount, digital (electronics, etc)
