The abacus calculation pen algorithm is based on the characteristics of modern abacus calculation structure: a gear has five beads, one on the beam, four under the beam, one on the beam represents 5, and one on the beam represents 1. The dots and horizontal lines represent the upper and lower beads of the abacus-the dots represent the beads on the beam, and the remaining four horizontal lines represent the four beads under the beam (one horizontal line represents 1). Replacing the beads with dots and horizontal lines and adding and subtracting according to the abacus formula is the abacus pen algorithm. Its characteristics are simple and easy to learn, easy to master, suitable for multiple continuous addition and subtraction operations, and can display the results at any time like abacus calculation. The notation is very helpful for students to know numbers and form the concept of numbers.

Method of number of strokes based on abacus

When applying the abacus pen algorithm, we should first memorize the abacus addition and subtraction formulas, especially the formulas of all five addition, carry addition, break five subtraction and abdication subtraction. Only by remembering these formulas can we calculate quickly and accurately. In addition, this method is most suitable for junior students to do one-digit addition and subtraction exercises, which is conducive to learning the addition and subtraction formula within 20 in mathematics.

Abacus addition and subtraction formula

Pen addition and subtraction formula based on abacus calculation

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For more written calculations based on abacus, please continue today's topic-learning abacus with a pen.

The above is the formula and content of abacus calculation, which is about the sharing of abacus calculation. Read the introduction of abacus, I hope this will help everyone!