The development history of numbers
Before numbers appeared, people had a way to tie knots to record things. For example, you have five sheep and tie five knots. Later, it was found that if 100 was tied one by one, it would not only be troublesome to tie the knot, but also ugly. Therefore, people have learned to use different colors or different shapes of knots to represent different units of numbers.
Later, people found it troublesome to count knots, so they began to count them with some items, such as the moon representing "1" and so on. At this time, someone counted with fingers, toes and pebbles.
People find this method inconvenient, so they learn to use symbols to represent numbers, such as "|" in ancient Egypt for "1", "n" for 10, wings for 10000, birds for 65438+ million and so on. And China at this time with wood, bamboo, bones and so on to count, called "calculation". Although this kind of counting will be simpler than before, it is helpless in the face of huge numbers. If you remember "1.500 million", how many bones to pile and how many birds to draw!
As a result, the ancient Indians invented several numbers, the most popular of which belongs to Brahmanism, the embryonic form of Arabic numerals now, but it is still not as simple as it is now. For example, "0" is "●" in ancient Indian numerals. In this way, a set of basic figures is produced. Later, this number spread to Arabia, and the Arabs revised this number into the current Arabic number. Arabs spread this number to Europe, and European businessmen thought it was invented by Arabs, so they called it Arabic numerals. At the same time, other countries also produced some figures, such as Roman numerals, which were also developed at this time.
Then, people invented binary, ternary and so on. However, because the decimal system should be the most widely used in real life, it is used more now. This counting method has been used up to now and is the simplest counting method at present.