1, unit 1, four operations. In this unit, the knowledge often examined in the exam is the mixed operation of addition and subtraction, and sometimes it involves the mixed operation with brackets. The chartering problem is also one of the best strategies, which should be grasped emphatically.
2. Unit 2 Observing objects. The content of this unit is relatively simple, focusing on cultivating children's spatial thinking ability.
3, the third unit operation method. The problem that often appears in this unit exam is to calculate by using the operation rules and characteristics of addition, subtraction, multiplication and division, especially the simple operation is the most important.
4. The meaning and nature of unit 4 decimals. This unit focuses on the meaning of decimals, the numerical changes caused by decimal movement, and the conversion between decimals and units.
5. Unit 5 Triangle. At most, it is to investigate the characteristics of the triangle and solve the problem by using the internal angle of the triangle and 180 degrees. The difficulty lies in how to use the internal angle and 180 degrees flexibly to find other angles or judge the type of triangle.
6. Unit 6 Addition and subtraction of decimals. This unit is the most difficult and important content of this book. Be sure to learn this unit well and master the calculation rules to lay a good foundation for future study.
7. The last three units have less class hours and the content is very simple. In the mid-term, the application of axial symmetry and translation drawing is the focus of CET-5 and CET-6, and the problem of chickens and rabbits in the same cage is also the key content. We must master the holiday method and solve the problem of chickens and rabbits in the same cage.
The above is about how to learn the second volume of fourth grade mathematics well.