1, addition: remember a large number in your mind, count the decimal up, for example, 4+2= remember 4 in your mind, count up two numbers, 5 and 6, and then get the result 4+2=6.
2. subtraction: remember large numbers in your mind and count down decimals, for example, 6-3= remember 6 in your mind, count down 3, 5, 4, 3, and then get the result 6-3=3.
How to learn primary school mathematics well;
1, don't be afraid of math.
Mathematics is a science that emphasizes logical thinking. You don't need to recite many knowledge points, but you need to use what you have learned flexibly. Students should strive to discover and develop their logical thinking ability, which can be improved through games, solving puzzles or other types of logical training.
2. Pay attention to oral arithmetic practice.
Oral arithmetic practice is very important in primary school mathematics learning, which can not only exercise thinking and improve memory, but also enable students to solve math problems faster. In daily life, we might as well do more oral arithmetic exercises, such as thinking and comparing oral arithmetic, which can effectively improve our math level.
3. Understand the concept
Mathematics is gradual. If you don't have a deep understanding of the basic concepts, then the next knowledge will be more difficult. For example, after understanding the concept of number, we should try to understand the positive and negative of number. These concepts are the basis of subsequent knowledge.
4. Pay attention to thinking training
Primary school mathematics is not only calculation, but also thinking, so we should pay attention to heuristic teaching, exercise children's thinking ability, and let children gradually like mathematics in the process of cultivating students' logical thinking ability.
Step 5 do interesting exercises
How to learn primary school mathematics well? If primary school mathematics is just rote learning, it will be a very boring thing. So we might as well do some interesting exercises, such as the interesting math contest held in our school, which can not only improve children's interest, but also consolidate their math knowledge.