The accumulation operation is to accumulate the numbers below the accumulation number one by one and follow the operation rules behind the accumulation number. For example, write i= 1 below σ and i= 10 above σ, then σ (the square of I). This gives the sum of squares from 1 to 10.

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Mathematics originated from early human production activities. The ancient Babylonians had accumulated some mathematical knowledge, which could be applied to practical problems. Judging from mathematics itself, their mathematical knowledge is only obtained through observation and experience, and there is no comprehensive conclusion and proof, but we should fully affirm their contribution to mathematics.

The knowledge and application of basic mathematics is an indispensable part of individual and group life. The refinement of its basic concepts can be seen in ancient mathematical classics of ancient Egypt, Mesopotamia and ancient India. Since then, its development has made small progress. But algebra and geometry at that time were still independent for a long time.

Algebra can be said to be the most widely accepted "mathematics". It can be said that algebra was the first mathematics he came into contact with since everyone began to learn to count when he was a child. Algebra, as a discipline to study numbers, is also one of the most important parts of mathematics. Geometry is the earliest branch of mathematics that people began to study.