NCERT Class 8 Maths Chapter 2 Exercise 2.2 Solutions - Scientific Notation & Standard Form

Mastering the representation of very large and very small numbers is simple with our NCERT Solutions for Class 8 Maths Ch 2: Power Play – Exercise 2.2. This exercise focuses on "Exponents and Powers" and specifically teaches students how to use scientific notation to make complex numbers easier to read, write, and compare. Exercise 2.2 concentrates on converting numbers between standard form and scientific notation (also known as usual form).

Learn how to easily work with big and small numbers in Class 8 Math Lessons (Ch 2). The solutions to Exercise 2.2 of Class 8 Maths will be presented in a step-by-step manner to help students understand how to move the decimal point and determine the correct power of 10. These NCERT Solutions are in accordance with the CBSE Guidelines to provide students with the best available path to improve their calculation speed and accuracy. Additionally, these solutions will aid students in building a solid foundation for future studies in physics and Chemistry, where scientific notation is used daily.

1.0Download Class 8 Maths Chapter 2 Ex 2.2 NCERT Solutions PDF

You can get a PDF of our simple NCERT Solutions for Class 8 Maths Chapter 2 Exercise 2.2. Ideal for rapid reference prior to tests and offline study.

2.0NCERT Solutions for Class 8 Maths Chapter 2 Power Play : All Exercises

3.0Key Concepts of Chapter 2 Exercise 2.2

• Standard Form (Scientific Notation): Expressing numbers as $a\times 10^n$ where $1\le a<10$ and n is an integer.
• Positive Exponents: Used when converting very large numbers into standard form (moving the decimal to the left).
• Negative Exponents: Used when converting very small decimals into standard form (moving the decimal to the right).
• Usual Form: Converting a number back from scientific notation to its expanded decimal or whole-number format.
• Comparing Numbers: Using powers of 10 to quickly determine which of two very large or very small numbers is greater.

4.0Benefits of NCERT Solutions for Class 8 Maths Chapter 2 Exercise 2.2

• Conceptual Clarity: Detailed explanations of how moving the decimal point affects the exponent of 10.
• Exam-Oriented: Covers all major conversion types found in CBSE school tests.
• Logical Steps: Every solution shows the count of decimal places moved to ensure no zeros are missed.
• Error Prevention: Teaches students a consistent direction-based rule (Left = Positive, Right = Negative) to avoid exponent sign errors.