1. Integer and natural number:
The concepts of natural numbers and integers: the concept, characteristics and representation of natural numbers; Comparison of the concepts of integer with positive integer and negative integer.
Integer addition and subtraction: rules of integer addition and subtraction and its practical application.
2. Score:
Understanding and expression of fractions: basic concepts of fractions, numerator and denominator of fractions, comparison of fractions, etc.
Addition and subtraction of scores: rules of addition and subtraction of scores, addition and subtraction of general and different scores, etc.
Application of fractions: the application of fractions in daily life, such as addition and subtraction of fractions in solving practical problems.
3. Decimal number:
The basic concept of decimal: the definition, bit value and pronunciation of decimal.
The relationship between decimals and fractions: the mutual conversion and application of fractions and decimals.
Decimal addition and subtraction: the rules of decimal addition and subtraction and its practical application.
4. Geometry:
Recognition and classification of figures: the basic concepts and classification of geometric figures such as lines, curves, closed curves, polygons, squares, rectangles and triangles.
The nature and application of graphics: the calculation of the nature, perimeter and area of different geometric graphics.
5. The design of mind map:
Core concepts: integer, fraction, decimal, geometric figure, etc. As the core, and expand the content of each knowledge point.
Branch details: each core concept lists the details of various knowledge points, such as the addition and subtraction of integers, the addition and subtraction of fractions, the bit value of decimals, and the properties of various geometric figures.
Association and application: linking different knowledge points, such as the conversion of fractions and decimals, the calculation of the perimeter and area of geometric figures, etc.
Mind mapping should clearly and concisely show the key knowledge points and related contents of the first book of fourth grade mathematics, so that students can better understand and remember these mathematical concepts. At the same time, the map design should also take into account the logical relationship and connection between knowledge points to help students master mathematics knowledge better.