First, prepare some cardboard, which can be your favorite color. Then measure it to the right size, preferably rectangular, and cut it out. Next, write a number on it with a pencil, such as the number "1", then draw an outline outside with a black or other color pen, and then add details to draw a zebra pattern. Draw a zebra's head, ears and eyes above "1", and draw some leaves around.

The same is true for other numbers, for example, the number "2" can be painted in the shape of a bear, the background can also be painted with some corn and honey, the number "3" can be painted as a kitten, the number "4" can be painted as a little frog and so on.

meaning

Mathematics is a universal means for human beings to strictly describe and deduce 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.

structure

Many mathematical objects, such as numbers, functions, geometry, etc., reflect the internal structure of continuous operation or the relationships defined therein. Mathematics studies the properties of these structures, for example, number theory studies how integers are represented under arithmetic operations. In addition, things with similar properties often occur in different structures, which makes it possible for a class of structures to describe their state through further abstraction and then axioms. What needs to be studied is to find out the structures that satisfy these axioms among all structures.

Therefore, we can learn abstract systems such as groups, rings and domains. These studies (structures defined by algebraic operations) can form the field of abstract algebra.