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Handbook of mathematical practice
Math exercises include clocks, digital tablets and plasticine pizza.

handwork

Handwork is a Chinese vocabulary, and the pinyin is sh ǒ ug not ng, which means that it is not mass production of machinery and equipment, but manual production. In the early stage of industrialization, handicraft industry once became synonymous with low productivity and uneven quality.

However, in the highly developed era of contemporary industrial production, people are increasingly tired of undifferentiated and distinctive products produced by factory assembly lines, and handmade products have regained their vitality.

Zhang Tianyi's children: "Once, I studied handicrafts. I may make some money recently. " Ding ling's mother: "the other two young female teachers, one surnamed Zhang, teach pictures;" One is Mr. Chu's daughter, who teaches handicrafts. "Xie Juezai's Notes on Flower Watching:" Spinning, training and weaving are all done by hand, and the products are mostly quilt fabrics. "such as: manual labor.

Knowledge expansion:

Practice is a Chinese character, pinyin: shí jià n. Specific meaning: the conscious activity of transforming society and nature. Actually do it; Fulfill. In nuclear radiation protection, practice refers to the activity of increasing radiation exposure dose.

Practice is all human conscious actions. The contradiction between inner consciousness ontology and life ontology is the fundamental contradiction to promote human self-liberation.

Its externalization is the liberation activity of human individuals, organizations and classes to form the relationship between nature and individuals or collectives and class relations through the whole production relations. Practice is human nature and personality only under conscious consciousness, that is, as the saying goes: practice makes true knowledge.

General practice begins and ends with the beginning and end of individual life, and changes with the change of individual consciousness in the current situation. According to the relative performance, it is hidden or obvious, explosive or burning, strong or weak, orderly or disorderly, continuous or intermittent, and complicated. Based on relative consideration, physical exercises and psychological exercises, individual exercises and group exercises.

Wei Wei's Oriental, Chapter 5: "Experience comes from practice and wisdom comes from struggle." Xu Mingwei's Monument to Mr. Ji's Ancestral Temple: "Mr. Ji has written millions of words, most of which are meticulous in research and practice."