Unit 3, Grade Five Math Class:

1, observation object. Observing objects from different angles, the shapes you see may be different; The front, side and back are all relative and change with the change of observation angle. By observing, imagining and guessing, we can cultivate our spatial imagination and thinking ability and correctly identify the shape of simple objects observed from the front, side and above.

2. Simple equation. When a number is represented by letters, the value of the formula containing letters will be found according to the value of letters. Can use equations to solve simple practical problems.

3. The area of the polygon. The area of parallelogram, triangle and trapezoid can be calculated by knowing the rotationally symmetric figure.

4. Statistics and possibilities.

Math:

Mathematics [English: Mathematics, from ancient Greece μ? θξμα(máthēma)； Often abbreviated as math or maths], it is a discipline that studies concepts such as quantity, structure, change, space and information.

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.

Mathematical logic and mathematical foundation;

Deductive logic (also known as symbolic logic), proof theory (also known as meta-mathematics), recursion theory, model theory, axiomatic set theory, mathematical basis, mathematical logic and other disciplines.

Number theory:

Elementary number theory, analytic number theory, algebraic number theory, transcendental number theory, Diophantine approximation, number geometry, probability number theory, computational number theory, number theory and other disciplines.