Divide three digits by one digit, and list the basic verticals of divisor and dividend first; The ratio from the highest dividend to the dividend. If the first digit is greater than the divisor, the position quotient of the quotient of the first digit (the quotient divided by the divisor is less than the first digit of the dividend).

Align the product of quotient and divisor and write it in the first position of dividend, calculate the difference between the first position of dividend and it, and move the next position of dividend down, and repeat the previous step until the calculation is completed.

Vertical introduction:

Vertical type means that each transition number is changed by the last transition number, and then the single digits of the last transition number are multiplied by 2. If carry is needed, proceed to 1, then increase the unit number by ten digits, and so on, and add a new operand to the unit number. Longitudinal formula refers to a longitudinal formula in the calculation process, which makes the calculation simple.

Introduction to mathematics:

Mathematics [English: Mathematics, from ancient Greece μ? θξμα(máthēma)； Often abbreviated as math or maths], it is a discipline that studies concepts such as quantity, structure, change, space and information. Mathematics is a universal means for human beings to strictly describe and deduce the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence.

In this sense, mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics. Mathematics plays an irreplaceable role in the development of human history and social life, and it is also an indispensable basic tool for studying and studying modern science and technology.

Development history:

In ancient China, mathematics was called arithmetic, also called arithmetic, and finally it was changed to mathematics. Arithmetic in ancient China is one of the six arts, which is called number. Mathematics originated from the early production activities of human beings, and the ancient Babylonians had accumulated some mathematical knowledge, which could be applied to practical problems.

As far as mathematics itself is concerned, their mathematical knowledge is only obtained through observation and experience, and there is no comprehensive conclusion and proof, but their contribution to mathematics should also be fully affirmed. The knowledge and application of basic mathematics is an indispensable part of individual and group life.

The refinement of its basic concepts can be found in ancient mathematical documents of ancient Egypt, Mesopotamia and ancient India. Since then, its development has continued to make small progress. But algebra and geometry at that time were still independent for a long time.