The number 12 on the button stands for 12 floor. This topic mainly examines the understanding of the number 12. Understanding of Numbers: The number "1" can be compared to a stick, a crutch, an upright gun, a candle and a one-dimensional space. The number "2" can be compared to a wooden horse, a kneeling person, a steep slope, a slide and a goose. "3" can be compared to two fingers, chest, cross-eyed, branches and inverted W.

Introduction to mathematics:

Mathematics is a subject that studies concepts such as quantity, structure, change, space and information. Mathematics is a universal means for human beings to strictly describe the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence. In this sense, mathematics belongs to formal science, not natural science.

Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics. Mathematics plays an irreplaceable role in the development of human history and social life, and it is also an indispensable basic tool for studying and studying modern science and technology.