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The fourth grade mathematics textbook book 2
The fourth grade of mathematics published by Beijing Normal University, Volume II, summarizes the knowledge as follows:

1, addition and subtraction of three digits: learn the addition and subtraction of three digits, including the calculation methods of carry and borrow.

2. Cognition and operation of fractions: Understand the concept of fractions, learn the comparison of fractions, the operation of equal fractions and the simple addition and subtraction of fractions.

3. Understanding and operation of decimals: Understand the concept of decimals, learn how to read decimals, compare the size of decimals, and add and subtract decimals.

4. Conversion of hours, minutes and seconds: learn the conversion relationship of hours, minutes and seconds, and master the reading and calculation methods of time.

5. Conversion of length units: learn the conversion between meters, decimeters and centimeters, and can perform simple conversion calculation of length units.

6. Understanding of Polygons: Learn the characteristics and properties of polygons such as squares, rectangles, triangles and quadrangles.

7. Simple algorithm: Introduce simple algorithms such as integer multiple of multiplier and integer multiple of divisor.

Beijing Normal University Edition Mathematics is a set of mathematics textbooks compiled by Beijing Normal University Press. This set of teaching materials is mainly aimed at the primary school stage, including the mathematics content of grades one to six. Mathematics of Beijing Normal University aims at cultivating students' mathematical thinking and problem-solving ability, and pays attention to cultivating students' logical thinking, creative thinking and practical application ability.

Characteristics of Mathematics Textbooks Published by Beijing Normal University

1. Solid and comprehensive knowledge: The textbook covers all aspects of primary school mathematics, including integers, fractions, decimals, algorithms, geometric shapes, data processing and so on. Through systematic and step-by-step study arrangements, students are helped to establish a solid foundation in mathematics.

2. Combination of theory and practice: The textbook pays attention to the combination of theoretical knowledge and practical application. Each chapter sets up a large number of practical problems and cases to encourage students to apply mathematical knowledge to real life situations and cultivate their practical application ability.

3. Emphasize the cultivation of thinking: The textbook emphasizes the cultivation of students' mathematical thinking and problem-solving ability. Through enlightening problem design, students are encouraged to actively think, explore and solve mathematical problems, and their logical thinking, creative thinking and critical thinking are cultivated.