Knowledge points of mathematics in the second grade of primary school
Addition formula table:
1+ 1=2
1+2=3 2+2=4
1+3=4 2+3=5 3+3=6
1+4=5 2+4=6 3+4=7 4+4=8
1+5=6 2+5=7 3+5=8 4+5=9 5+5= 10
1+6=7 2+6=8 3+6=9 4+6= 10 5+6= 1 1 6+6= 12
1+7=8 2+7=9 3+7= 10 4+7= 1 1 5+7= 12 6+7= 13 7+7= 14
1+8=9 2+8= 10 3+8= 1 1 4+8= 12 5+8= 13 6+8= 147+8= 15 8+8= 16
1+9= 10 2+9= 1 1 3+9= 12 4+9= 13 5+9= 14 6+9= 157+ 9= 168+9= 17 9+9= 18
Subtraction formula table:
1- 1=0
2- 1= 1 2-2=0
3- 1=2 3-2= 1 3-3=0
4- 1=3 4-2=2 4-3= 1 4-4=0
5- 1=4 5-2=3 5-3=2 5-4= 1 5-5=0
6- 1=5 6-2=4 6-3=3 6-4=2 6-5= 1 6-6=0
7- 1=6 7-2=5 7-3=4 7-4=3 7-5=2 7-6= 1 7-7=0
8- 1=7 8-2=6 8-3=5 8-4=4 8-5=3 8-6=2 8-7= 18-8=0
9- 1=8 9-2=7 9-3=6 9-4=5 9-5=4 9-6=3 9-7=29-8= 1 9-9=0
10- 1=9 10-2=8 10-3=7 10-4=6 10-5=5 10-6=4 10-7=3 10-8=2 10-9= 1 10- 10=0
Summary of mathematics knowledge points in the second grade of primary school
First, understanding the angle.
1, characteristics of an angle: one vertex and two sides (straight)
2. The size of the angle is related to the size of both sides, and has nothing to do with the length of both sides.
3. The angle of painting:
(1) Fixed Vertex.
(2) Draw a straight line from this point.
(3) Draw another side (at right angles, aim at the drawn side with the right angle side and draw a line along the other right angle side).
Second, the classification of angles:
1, understanding right angles: the characteristics of right angles,
2. Know acute angle and obtuse angle: acute angle is less than right angle, and obtuse angle is greater than right angle.
3. You can judge the right angle, acute angle and obtuse angle with a triangular ruler: overlap the vertex of the right angle on the triangular ruler with the vertex of the compared angle, then overlap one side of the right angle on the triangular ruler with one side of the compared angle, and finally compare the other side of the right angle on the triangular ruler with the other side of the compared angle. This line is a right angle, the inside is an acute angle and the outside is an obtuse angle.
4. Draw right angles, acute angles and obtuse angles.
Mathematics learning methods and skills
Get into the habit of asking if you don't understand.
Parents should patiently explain the meaning of some questions that children don't understand and encourage them to ask if they don't understand. But parents should not tell him the answer directly. I think as long as you explain the problem clearly, the child can solve it by himself.
I found that children with poor grades tend to be more dependent and unwilling to think independently. They either wait for the teacher to explain in class or turn around and expect other students. These students must be dragging their feet when they do their homework at home. Parents should pay attention to correct guidance.
Senior two students have entered school for one year and have a certain foundation of study habits. However, due to their age characteristics, they are prone to the following shortcomings in math learning:
First, note:
Students are young, have poor conscious attention and don't persist for a long time. A class lasts for 40 minutes, and it is difficult to stick to the end. Often after listening to half of it, you are distracted, or look around, talk casually, or make small moves.
Second, listen:
It is a common problem for many junior students not to listen. However, students have a strong desire to express themselves and often have no time to listen to a complete sentence. I rushed to answer with a little knowledge, ignoring the teacher's suggestions and other students' speeches.
Third, reading and writing:
Careless, often see the problem incomplete, wrong numbers upside down or wrong lines, wrong operation symbols, or incomplete pictures. I didn't pay enough attention when I wrote, but I copied it correctly. I didn't write carefully, and my writing was very sloppy. I didn't check it after I finished writing it.
Fourth, think about it:
The thinking development of grade two students is not comprehensive and systematic, mainly based on intuitive thinking. When they encounter problems that require logical thinking or examine the ability of spatial imagination, their thinking can't keep up, and their brains can't turn around, so they will be at a loss and cope with congestion.
Verb (abbreviation for verb) language:
Due to the lack of life experience and accumulated vocabulary, the language is monotonous and straightforward, and even if you understand the reasoning, you often can't make it clear when you express it orally.
Articles about knowledge points in the first volume of second-grade mathematics published by Beijing Normal University;
★ How to design the second grade math review teaching plan of Beijing Normal University Edition?
★ Encyclopedia of Mathematics Learning Methods in Different Grades
★ Encyclopedia of Mathematics Learning Methods in Different Grades
★ Beijing Normal University Edition Grade Two Volume 1 Mathematics Examination Questions
★ Review method
★ Guidance of mathematics learning methods in the second grade of primary school
★ Beijing Normal University Edition Grade Two Mathematics Volume I Teaching Plan
★ Guidance on learning methods in the second grade of primary school
★ Learning skills of primary school students