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Mathematics in Class 8 plays a critical role in shaping a student’s problem-solving abilities and logical reasoning. It is the stage where students move beyond basic arithmetic into abstract concepts like algebra, geometry, and data handling, which later form the backbone of Class 9 and 10 Mathematics.

For the academic year 2020–2021, the Central Board of Secondary Education (CBSE) made updates to the syllabus to reduce student workload while ensuring the continuation of essential learning outcomes. The global shift to online learning during the pandemic meant CBSE had to balance curriculum reduction with maintaining quality education.

This blog provides an elaborative look into the updated Class 8 Maths syllabus, the rationale behind the changes, and how students can prepare effectively (Refer).

Updated CBSE Class 8 Maths Chapters 2020–21

Here’s a chapter-wise breakdown of the syllabus, with explanations on why each is important:

  1. Rational Numbers
    Students explore addition, subtraction, multiplication, and division of rational numbers. This lays the groundwork for algebra and higher arithmetic.
  2. Linear Equations in One Variable
    Introduces problem-solving using algebra. Learning to form and solve equations prepares students for algebraic applications in Class 9 and 10.
  3. Understanding Quadrilaterals
    Builds geometric understanding of shapes like parallelograms, trapeziums, and kites. The angle sum property is crucial for advanced geometry.
  4. Practical Geometry
    Focuses on constructing geometrical figures with tools like a compass, ruler, and protractor. Practical applications make this topic engaging.
  5. Data Handling
    Covers mean, median, mode, and graphical representation of data. These skills are relevant for statistics and real-world problem analysis.
  6. Squares and Square Roots
    Helps students estimate and calculate roots, a skill essential for algebra and quadratic equations in higher classes.
  7. Cubes and Cube Roots
    Introduces cube numbers and roots, reinforcing number sense and factorization.
  8. Comparing Quantities
    Deals with percentages, profit and loss, simple interest, and compound interest. This has direct real-life applications in finance.
  9. Algebraic Expressions and Identities
    Teaches students to expand, simplify, and factorize. A core skill for algebra in Class 9 and beyond.
  10. Visualizing Solid Shapes
    Focuses on three-dimensional geometry — nets, views, and representation. It strengthens spatial reasoning.
  11. Mensuration
    Students calculate surface areas and volumes of 3D objects. This skill is practical and forms the base for engineering concepts.
  12. Exponents and Powers
    Covers laws of exponents and expressing large numbers in standard form. Essential for scientific applications.
  13. Direct and Inverse Proportions
    Demonstrates relationships between quantities. Examples like speed-distance-time enhance understanding.
  14. Factorization
    Reinforces prime factorization and factorizing algebraic expressions, a vital skill for algebra and number theory.
  15. Introduction to Graphs
    Introduces plotting points, reading coordinates, and interpreting graphs. A stepping stone for coordinate geometry.
  16. Playing with Numbers
    Includes divisibility rules, number puzzles, and reasoning exercises, adding fun to logical problem-solving.

Why CBSE Updated the Syllabus in 2020–21

  • Reduced academic pressure: With online schooling, CBSE trimmed overlapping and less essential portions.
  • Focus on core learning: The retained topics are directly relevant for Class 9–10 Mathematics.
  • Adaptability to online learning: Visual and application-based topics (like graphs, mensuration, and data handling) fit well with digital teaching tools.
  • Smooth transition: Ensures students are not overwhelmed but still prepared for higher studies.

How to Prepare for Class 8 Maths Effective

  1. Start with NCERT: NCERT textbooks remain the most reliable source for exams.
  2. Daily practice: Mathematics improves with consistent problem-solving. Dedicate at least 1–2 hours daily.
  3. Make a formula sheet: Revise algebraic identities, mensuration formulas, and properties regularly.
  4. Use visual tools: For geometry and graphs, practice using diagrams and graphs for clarity.
  5. Apply to real life: Connect topics like percentages, interest, and ratios with real-world problems.
  6. Mock tests: Regular practice with sample papers helps improve speed and accuracy.

FAQs on 8th Standard Maths CBSE Updated Syllabus 2020–21

What are the major changes in the CBSE Class 8 Maths syllabus for 2020–21?


CBSE streamlined the syllabus in 2020–21 to reduce student stress during online learning. While no major chapters were removed, certain subtopics and repetitions were trimmed. The focus remained on core areas like algebra, geometry, and data handling that build the foundation for Class 9 and 10.

Which chapters are most important in Class 8 Maths for exams?


All chapters are important, but Linear Equations in One Variable, Algebraic Expressions & Identities, Mensuration, Data Handling, and Comparing Quantities carry more weight in exams. Students should also pay attention to Squares, Square Roots, and Graphs, as they form the base for higher-level mathematics.

How can I prepare effectively for Class 8 Maths exams?

Start with NCERT exercises and examples.

Make a formula sheet for quick revision.

Solve sample papers regularly.

Use real-life applications (like percentages in shopping, interest in savings, or geometry in crafts).

Allocate time daily for practice and revision.

Is NCERT enough for Class 8 Maths preparation?


Yes, NCERT is the primary and most reliable source for Class 8 Maths. However, for extra practice and higher-order thinking questions, students may refer to NCERT Exemplar or other reference books. The key is to master NCERT thoroughly first before moving to additional resources.

How is Class 8 Maths useful for higher classes?


Class 8 Maths introduces concepts like algebra, factorization, mensuration, and graphs that are heavily expanded in Class 9 and 10. Without a strong understanding at this stage, students may struggle later. Think of Class 8 as the foundation year that connects basic arithmetic to advanced mathematics.

What are the best tips to avoid silly mistakes in Class 8 Maths exams?

Read questions carefully before solving.

Write down steps clearly instead of doing mental math.

Double-check calculations, especially in mensuration and algebra.

Revise formulas daily to avoid confusion.

Manage time well during exams by practicing with mock tests.

Final Thoughts

The CBSE 8th Standard Maths syllabus for 2020–21 was designed with students’ holistic development in mind, balancing reduced workload with essential concepts. By focusing on fundamental topics like algebra, geometry, and data handling, CBSE ensured students build the right foundation for advanced classes.

For students, this was the year to adapt to online learning, master the basics, and approach maths with curiosity rather than fear. With consistent practice and a strategic approach like Kapdec, Class 8 becomes a stepping stone to mastering high school mathematics.