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Power Play

CBSE · Class 8 · Mathematics

Complete topic list for Power Play in CBSE Class 8 Mathematics. Key concepts, sub-topics, and what to focus on for board exams.

44 questions24 flashcards5 concepts
4 Topics · CBSE Class 8 Mathematics

Topics in Power Play

1

Experiencing Exponential Growth

  • Paper folding experiment demonstrates exponential growth - thickness doubles with each fold
  • After 10 folds: thickness ≈ 1 cm, after 17 folds: ≈ 131 cm (4+ feet)
  • After 26 folds: ≈ 670 m (height of Burj Khalifa is 830 m)
2

Exponential Notation and Basic Operations

  • n^a means n multiplied by itself 'a' times
  • Base: the number being multiplied, Exponent/Power: how many times to multiply
  • n² = n squared, n³ = n cubed, n⁴ = n to the power 4
3

Zero and Negative Exponents

  • Any non-zero number raised to power 0 equals 1: n⁰ = 1
  • Division rule: n^a ÷ n^b = n^(a-b) when a > b
  • Negative exponents: n^(-a) = 1/n^a and 1/n^(-a) = n^a
4

Powers of 10 and Scientific Notation

  • Powers of 10: 10¹ = 10, 10² = 100, 10³ = 1000, etc.
  • Scientific notation format: a × 10^n where 1 ≤ a < 10, n is integer
  • Large numbers: positive exponent (5900 = 5.9 × 10³)

Key Concepts

When quantities multiply by a constantWriting repeated multiplication in short formKey rulesSpecial importance of base 10Writing numbers as x × 10ʸ

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Frequently Asked Questions

What are the important topics in Power Play for CBSE Class 8 Mathematics?

Power Play covers several key topics that are frequently asked in CBSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.

Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

Previous Chapter

A Square and A Cube

Next Chapter

A Story of Numbers

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All 7 chapters — CBSE Class 8 Mathematics Syllabus