I. Addition, subtraction, multiplication and division of numbers
Addition and subtraction in 1 and 10
The addition and subtraction within 10 is the most basic knowledge point in junior high school mathematics, which requires students to master the addition and subtraction of various numbers and be able to use them flexibly.
Addition and subtraction within 2.20
Based on the addition and subtraction within 10, this paper introduces the calculation methods of carry and borrow, and requires students to master all kinds of principles and methods of carry and borrow.
3. Multiplication formula
Multiplication formula is the content that junior high school mathematics must master. It can help students do multiplication quickly and improve their mathematical operation ability.
4. A preliminary understanding of division
The preliminary understanding of division is one of the key points in senior two mathematics learning, which requires students to understand the significance and basic properties of division and to perform simple division calculation.
Second, time addition, subtraction, multiplication and division
1 24-hour clock
The 24-hour system is the basis of the time system, and students need to master the expression of the 24-hour system and the conversion of time units.
2. Add, subtract, multiply and divide hours, minutes and seconds
The addition, subtraction, multiplication and division of hours, minutes and seconds is one of the most basic calculation methods in the time system.
Third, the length of addition, subtraction, multiplication and division
1, length unit conversion
The conversion of length units is one of the more important knowledge points in junior high school mathematics.
2. Addition, subtraction, multiplication and division of meters, decimeters and centimeters
The meter, decimeter and centimeter are the most basic units in length measurement.
Fourth, other formulas
1, area formula
Rectangular area = length x width
Square area = side length x side length
Circular area =πx radius?
2. Volume formula
Cuboid volume = length × width × height
Cubic volume = side length × side length × side length
Cylinder volume =πx radius? X height
Cone volume =πx radius? X height /3
3, surface area formula:
Cuboid surface area =2x length x width +2x length x height +2x width x height
Cubic surface area =6x side length?
Cylinder surface area =2xπx radius x height +2xπx radius?
4. Volume formula: cuboid volume = length x width x height.
Cubic volume = side length × side length× side length
Cylinder volume =πx radius? X height
Matters needing attention in learning primary school mathematics
1, pay attention to the study of basic knowledge.
The basic knowledge of primary school mathematics includes the concept of numbers, addition, subtraction, multiplication and division, fractions, decimals, geometric figures and so on. You need to master it carefully.
2, proficient in arithmetic operations
The core of primary school mathematics is arithmetic operation, which needs to master the operation methods of addition, subtraction, multiplication and division skillfully and can be calculated quickly and accurately.
3. Cultivate logical thinking and problem-solving ability.
Primary school mathematics pays attention to cultivating students' logical thinking and problem-solving ability, and needs to cultivate students' ability to find problems, be good at asking questions and solving problems.
4. Understand mathematical ideas
Primary school mathematics is not only a simple pile of formulas and calculation methods, but also an understanding of mathematical ideas, such as mathematical induction and abstract thinking.
Step 5 do more exercises
Mathematics needs constant practice to master, and more practice is needed to consolidate the knowledge learned and improve the ability to solve problems.