Written calculation [paper calculation]; Pen calculation is a method of writing formulas or calculating grass with a pen, and it is the most commonly used calculation method in mathematics. Related calculation methods include mental calculation, oral calculation and so on.
Pen (pen) bǐ A tool for writing and drawing: a writing brush. Same as pencil holder of Peninsula. Pen bravery. Points, horizontal lines, straight lines, strokes, strokes, etc. Formed Chinese characters. Stroke order pen shape pen path. Written with a pen, written by the author. Ghostbook pen ploughing pen talking. A clerical error. Translation. The skills or characteristics of writing, painting and composition under a pen name: brushwork. Brushwork, pen power. The writing style is meticulous and the writing style is foreshadowing.
Straight as a pen: straight. Straight man. This pen is steep. Quantifier refers to money: a sum of money. Refers to prose: "Xie Xuanhui is good at poetry and Ren Yan is good at writing". Paper calculation
Count: Count the grass. Abacus. Formula. Accounting arithmetic. Calculate (a. calculate the quantity; B. consider; C. estimation; D. secretly draw a line to hurt others. "Mi" is read softly). Liquidation. Budget.
A method of writing formulas or calculating grass with a pen. Zhang's "A Brief Introduction to National Heritage Primary School" notes: "A single book can't count knives and pens": "In ancient times, words were counted as the beginning of Brahma. See Kaiyuan Zhan Jing for details. "