First of all, the digital world
In the mathematics study of the first volume of the fifth grade, we began to come into contact with a larger digital world, including natural numbers, integers, decimals, fractions and percentages. The concepts and properties of these numbers make our understanding of logarithms deeper.
1, natural numbers and integers: natural numbers are our common 1, 2, 3, ... and so on. , and integers include positive integers, 0 and negative integers. These numbers are widely used in daily life and study.
2. Decimal system: The study of decimal system gives us more logarithmic expressions, such as 0.5 and 0.75. The addition, subtraction, multiplication and division of decimals also give us a deeper understanding of logarithmic operations.
3. Score: A score is a number indicating the relationship between a part and the whole, such as 1/2, 2/3, etc. The addition, subtraction, multiplication and division of fractions and the conversion with decimals are the key points of learning.
4. Percentage: Percent refers to the percentage of one number relative to another, such as 50%, 200%, etc. The conversion and application of percentage, fraction and decimal is the key to learning.
Two, four operations
The first book of grade five began to learn four operations, including addition, subtraction, multiplication and division. These operations not only play an important role in digital operations, but also are important tools for us to solve practical problems. Addition and subtraction: Addition and subtraction are basic mathematical operations, and we have learned their algorithms and applications. Division: Multiplication and division are more complicated than addition and subtraction. We studied their algorithm and its application in practical problems.
Third, the world of graphics
In the first volume of the fifth grade, we also began to contact the world of graphics, including plane graphics and three-dimensional graphics. The study of these figures makes us have a deeper understanding of space.
1. Plane figure: We have studied the properties of common plane figures such as rectangle, square, triangle and circle, and the calculation method of perimeter area.
2. Three-dimensional graphics: We also studied the properties of common three-dimensional graphics such as cuboids, cubes and cylinders, as well as the calculation methods of surface area and volume.
Four. Statistics and probability
In the mathematics study of the first volume of the fifth grade, we also began to contact the knowledge of statistics and probability. This knowledge gives us a deeper understanding of the data and lays a foundation for our future study and life.
To sum up, the mathematics knowledge in the first volume of grade five covers the world of numbers, four operations, the world of graphics and the basic knowledge of statistics and probability. This knowledge not only lays a foundation for our future mathematics study, but also has a wide range of applications in our daily life and study.