Addition is one of the four basic operations, which refers to the calculation of combining two or more numbers and quantities into one number and quantity. The symbol of addition is the plus sign "+". Connect items with a plus sign when adding.
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The number system in general addition is called addend, and the result is called sum; Addition is to transfer so many addends into sum. This is different from the factor to be multiplied. In fact, during the Renaissance, many writers did not consider the first plus sign at all. Today, due to the nature of bonus exchange, "cannon" is rarely used, and these two terms are usually called addend.
All the above terms come from Latin. "Add" and "add" are English words derived from the Latin verb addere, and the latter is "original"-that is, "ad" and "; So supplement is to give.
Using the gerund suffix -nd leads to "addend" and "something to add". Similarly, from the perspective of "increase", one is what is added.
Sum and sum and are derived from Latin nouns "highest, highest" and related words. Because the upward trend in ancient Greece and Rome is contrary to the modern downward practice, one number is higher than the addend.
Plus sign "+"(Unicode: u+002b; ASCII:+) is the abbreviation of Latin "et", which means "harmony". Appearing in Wu Xue's works in Digital Communication Museum, at least it can be traced back to 1489.
Additive essence
It is exactly the same thing, that is, the repetition or accumulation of similar things, which is the beginning of numerical operation. Different kinds, such as an apple and an orange, can only be equal to two acres or a fruit, so there is a relationship between classification and classification. Subtraction is the inverse operation of addition; Multiplication is a special form of addition; Division is the inverse operation of multiplication; Power is a simple form or formula of multiplication.
The root is the inverse operation of power; Logarithm is the law of finding power term; Derivative is developed from logarithm; Then differential and integral. The development of digital operation is a more special situation and a more repetitive law.