## CBSE Class 7th Maths:

### 1. **Number System:**

**Natural Numbers:**Numbers used for counting (1, 2, 3, ...).

**Whole Numbers:**Natural numbers along with zero (0, 1, 2, 3, ...).

**Integers:**Positive and negative whole numbers (... -3, -2, -1, 0, 1, 2, 3, ...).

**Rational Numbers:**Numbers that can be expressed as fractions (p/q where p and q are integers and q ≠ 0).

### 2. **Basic Operations:**

**Addition, Subtraction, Multiplication, Division:**Understand properties and rules for performing these operations on integers, fractions, and decimals.

### 3. **Algebraic Expressions:**

**Variables and Constants:**Understand symbols used to represent unknown quantities (variables) and fixed values (constants).

**Simplification:**Combine like terms, and use distributive property.

### 4. **Geometry:**

**Basic Shapes:**Understand the properties of triangles, quadrilaterals, circles, and polygons.

**Measurement:**Calculate the perimeter and area of squares, rectangles, triangles, and circles.

**Symmetry:**Identify symmetrical figures.

### 5. **Ratio and Proportion:**

**Ratio:**Comparison of two quantities by division.

**Proportion:**Equation involving two ratios.

**Applications:**Solve problems related to proportions in daily life scenarios.

### 6. **Data Handling:**

**Representation of Data:**Use of bar graphs, line graphs, and pie charts.

**Mean, Median, Mode:**Calculate and interpret these measures of central tendency.

### 7. **Mensuration:**

**Perimeter and Area:**Formulas and applications for rectangles, squares, triangles, and circles.

**Volume:**Calculate the volume of cubes, and cuboids.

**Surface Area:**Calculate the surface area of cubes and cuboids.

### 8. **Fractions and Decimals:**

**Operations:**Addition, subtraction, multiplication, division of fractions and decimals.

**Conversion:**Convert fractions to decimals and vice versa.

### 9. **Time and Work:**

**Work:**Understand work done, work rate, and time.

**Applications:**Solve problems related to time, work, and efficiency.

### 10. **Probability:**

**Likelihood:**Understand probability as a measure of chance.

**Experimental and Theoretical Probability:**Calculate probabilities of events.

### Tips for Studying Maths:

**Practice Regularly:**Solve problems from textbooks, worksheets, and additional resources.

**Understand Concepts:**Focus on understanding the principles behind formulas and procedures.

**Use Diagrams and Visual Aids:**Visualize geometric shapes and data representations.

**Ask for Help:**Seek clarification from teachers or peers when encountering difficult concepts.

By mastering these topics and practicing regularly, students can build a strong foundation in mathematics for CBSE Class 7th and beyond. Regular revision and application of concepts in real-life scenarios will enhance understanding and problem-solving skills.

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