1. Text content of second-year students' mathematics handwritten newspaper
1, the addition and subtraction within 20 (carry addition within 20, abdication subtraction within 20) and abdication subtraction formula within 20.
10- 1=9 1 1-2=9 12-3=9 13-4=9 14-5=9 15-6=9 16-7=9 17-8=9 18-9=9
10-2=8 1 1-3=8 12-4=8 13-5=8 14-6=8 15-7=8 16-8=8 17-9=8
10-3=7 1 1-4=7 12-5=7 13-6=7 14-7=7 15-8=7 16-9=7
10-4=6 1 1-5=6 12-6=6 13-7=6 14-8=6 15-9=6
10-5=5 1 1-6=5 12-7=5 13-8=5 14-9=5
10-6=4 1 1-7=4 12-8=4 13-9=4
10-7=3 1 1-8=3 12-9=3
10-8=2 1 1-9=2
10-9= 1
2. When looking at the picture to solve the problem, we should use the known conditions in the picture to formulate correctly.
Commonly used relationships are:
(1) number of parts+number of other parts = total.
(2) Total number of parts = number of other parts
(3) Large number-decimal number = who is more than who, or who is less than who.
Find the addition of large numbers. Subtraction of decimal or phase difference sequence.
(4) Original-Borrow = How much is left, and how much is left by column subtraction.
3. When solving application problems, we should formulate them correctly according to the known conditions.
(1) Total score relationship (addition and subtraction)
Number of Parts+Number of Other Parts = Total-Number of Parts = Number of Other Parts
(1) when "a * * *, * *, full-length, original, etc." Appears in the question to indicate the total, the column is added.
(2) Column subtraction when there is "surplus, surplus, surplus, first time, second time, used up, finished eating, etc.". In question.
(2) Size relation (addition and subtraction)
Large number-decimal = difference-difference = decimal+difference = large number
The number after the word "more" or "less" is the difference.
② The numbers on the left and right sides of the word "Bi" are large numbers and decimals respectively.
Find the addition of large series and the subtraction of decimal or difference series.
2. The second grade primary school students' mathematics handwritten newspaper text content
(1) equatorial plane 1, cuboid
A rectangle is long and has six planes, some are the same, some are different, and the opposite sides of a cuboid are equal, which can be used to draw a rectangle. The matchboxes and pencil boxes you usually see are cuboids.
2. Cubic
A cube is square. It also has six planes, and its sides are straight. Moreover, its sides are all the same length, and each face is the same size. No matter how flat it is on the table, the height is the same, which can be used to draw a square. The Rubik's Cube is a cube.
Step 3: Cylinder
A pillar is like a pillar. It has two upper and lower round faces, which are the same size, so it can be used to draw a circle; The other side is curved, so we can put the curved side on the table and roll it.
Step 4: Ball
Round, the ball that can roll around is the ball. The ball, basketball and football you usually play are all balls.
(2) Plane graphics
1, rectangle: four sides, two long sides are equal and two short sides are equal.
2. Square: four sides with the same length.
3, round: no edges and corners
4. Triangle: Three sides
3. The second grade primary school students' mathematics handwritten newspaper text content
(Counting) Knowledge points:
1. Count the number of each object by hand and mouth in a certain order.
2. The number of objects can be correctly represented by the number 1- 10.
(Understanding of Numbers within 10)
Knowledge points:
1, and the number "1" that can be intuitively understood can represent both a single object and a set.
2. Understand the symbolic representation of 1- 10 in the counting process.
3. Understand that the number from 1 to 10 can represent not only a few, but also the first one, so as to understand the relationship and difference between cardinality and ordinal number: cardinality represents the number of quantities, and ordinal number represents the order of quantities.
(1 ~ 5 Understanding and Writing)
Knowledge points:
1, can correctly count the number of objects within 5.
2. Write the number of 1-5 correctly.
(Understanding of 0)
Knowledge points:
1. Understand the origin and meaning of "0". 0 can indicate that there is no object, or it can indicate the starting point and demarcation point.
2. Learn to read and write "0".
(6 ~ 10 Understanding and Writing)
Knowledge points:
1 can correctly count the number of objects with the number of 6- 10.
2. Can read and write numbers from 6 to 10.