The calculation of power in the People's Education Press was learned in the eighth grade.

Operation, in mathematics, operation is a behavior that obtains new quantities through possible combinations of known quantities. The essence of operations is the mapping between sets.

Generally speaking, operations refer to algebraic operations, which are a correspondence in a set. For a pair of elements a and b taken out in order from set A, there is a unique third element c in set A corresponding to them, which is called an operation defined in set A.

Two operations can be derived from this operation, that is, one of a and b is regarded as what is sought, and c is regarded as known. The operation obtained in this way is called the original operation. Inverse operation. For example, addition is the operation of finding a + b = c when a and b are known. Then the operation of finding b when a and c are known, or the operation of finding a when b and c are known is the inverse operation of addition, which is called subtraction. .

Algebraic operations are all binary operations. There are many examples of binary operations. Addition, subtraction, multiplication, division, exponentiation, square root, logarithm between numbers; intersection, union, complement, difference, Cartesian product between sets; logical AND, logical OR, etc.

Related famous quotes

1. Countability rules the entire world of quantity, and the four arithmetic operations can be regarded as all the equipment of a mathematician. ——Maxwell

2. Robots can surpass humans in terms of work intensity, computing speed and memory function, but they cannot surpass humans in terms of consciousness and reasoning.

——Zhou Haizhong