The old abacus formula table jingled.

First, the old abacus formula table is jingle.

1, one to one, two to two, three times five to two, four times five to one.

2, one to nine into one, two to eight into one, three to seven into one, four to six into one.

3. Five to five into one, six to four into one, seven to three into one and eight to two into one.

4, nine to one into one, ten to zero into one, dislocation needs to be adjusted, remember.

Second, the meaning of abacus formula table

1, one to one

One is to add a bead to the abacus. When we add a bead to a certain position of the abacus, the value on this position will increase by 1.

2. The meaning of "from five to four years old"

A blow refers to reducing a bead on the abacus. When we subtract a bead from a bit of the abacus, the value on this bit will decrease by 1. Five MINUS four means that if we want to subtract five from a certain position, but there are only four beads in this position, then we actually need to add a bead in the adjacent position and then subtract 1 from this position.

Evolution, significance and application of ancient abacus;

1, the evolution of the old abacus:

The old abacus originated in Shang and Zhou Dynasties, and after thousands of years of development and evolution, it has formed today's abacus culture. Ascending algorithm is the predecessor of abacus. After many generations of continuous improvement and perfection, today's old-fashioned abacus was finally formed. As an old-fashioned abacus calculation tool, the abacus was invented by Liu Hong, a "sage" in the Eastern Han Dynasty, and gradually became popular.

2, the meaning of the old abacus:

The old abacus is the intangible cultural heritage of China, and it is also listed as the intangible cultural heritage of mankind by UNESCO. The old-fashioned abacus calculation bears the wisdom and talent of the ancients and is an important part of China traditional culture. Learning old-fashioned abacus is helpful to improve children's thinking ability, attention and observation, and enhance their memory ability.

3, the use of old abacus:

The ancients used old-fashioned abacus tools to calculate numbers, manage accounts and settle trade. Make life more convenient. The ancient abacus calculation method is very unique. It uses a set of formulas to guide the movement and combination of abacus beads, and thus obtains the calculation results. Old-fashioned abacus used to be very common in history, but in modern society, it is gradually forgotten because of the popularity of electronic calculators.