Abacus fortune-telling digital analysis _ abacus fortune-telling digital analysis daquan

The upper bead of the abacus represents 5, and the lower bead represents 1. ?

From right to left, each bead represents a decimal number, ten, hundred, thousand and ten thousand. Coupled with the software-a set of operating formulas for finger-playing rules, it can solve all kinds of complicated operations and even prescribe multiple prescriptions. Abacus is the predecessor of modern computer and the symbol of ancient computing technology in China.

Abacus shape

The new shape of the abacus is rectangular, with a wooden frame around it and a straight column inside, commonly known as "file". Generally, from the ninth gear to the fifteenth gear, the beam is placed horizontally on the gear, two beads are placed on the beam, each bead counts as five, and five beads are placed under the beam, each bead counts as one. Calculate the beads after positioning, and you can do algorithms such as addition, subtraction, multiplication and division.

The existing abacus has different shapes and materials. Generally, abacus is made of wood (or plastic). The abacus consists of a string of beads arranged in a rectangular wooden frame for several days. A beam divides several beads into upper and lower parts, and several beads run through the vertical column, commonly known as "gear", which is generally 9 gear, 1 gear or 13 gear. There is a beam in the middle of the file, and there are 1 beads on the beam, and this bead is 5; 5 beads under the beam, each bead 1.