The History of the Sign for Addition

The earliest plus (+) history we can go back to is the Egyptian hieroglyph. The added logo is represented as a pair of legs walking along the direction of the text, neither the left nor the right. Because the Egyptians can write from right to left or from left to right. In Italy, a plus sign (+) was adopted by astronomer Christopher Clavius. The first person who might use the plus sign (+) as an abbreviation is the author of the astronomer Nicole Oleme, the book of the 14th century "Sky and the World".

"Although there is a limit to the history as a Guide Roadmap, although you can show the correct direction, detailed information on the state of the road will not be provided, but the negative value as a warning sign is more explicit Even though it does not tell us what to do - by showing the most common mistakes human beings can easily make and repeat. "" People with my temper When he says that a wise person sometimes studies more, they are from fool, not fools; and the old Lyricalist is ... he lives on the street I am accustomed to forcing my students to listen to bad musicians.

There is a long history behind sign language, ASL actually started in Europe in the 18th century. For a while, the historical incident of Milan in 1880 brought a serious blow to sign language. This has banned the use of Sign Language in deaf schools in many countries. However, many individuals and organizations continue to live this language. In addition, sign language can survive wherever new hearing or assistive technology exists. Sign language is always needed, its popularity is continuing or even growing. For example, many schools offer sign language as a foreign language, and many schools also offer sign language clubs.