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Chapter 13 Class 7 Exponents and Powers

Get solutions of all NCERT Exercise questions and examples free at Teachoo. Answers to each and every question is provided in a step-by-step easy to understand way. Concepts are also explained before doing the questions

 

In this chapter, we will learn

  • What are exponents
  • Finding number when numbers are given as power
  • Finding greater number when numbers are expressed in power
  • Writing numbers as number with power using prime factorisation
  • Finding powers of negative numbers - (-1)Odd number = -1 & (-1)Even number = 1
  • Discussing Law of Exponents
    • Multiplying powers with same base (am × an = am + n )
    • Dividing Powers with the Same Base (am ÷ an = am - n )
    • Taking power of power ( (am)n = am × n )
    • Dividing Powers with the Same Exponents (am ÷ bm = (a/b)m
    • Numbers with exponent zero (a0 = 1)
  • Expressing numbers in Standard Form

 

Click on exercise or topic link below to start

Serial order wise

  Ex 13.1
  Ex 13.2
  Ex 13.3
  Examples

Concept wise

  Exponents
  Finding which is greater
  Prime factorisation
  Power of 1 and -1
  Negative Exponents and 0 Exponent
  Law of exponents
  Writing numbers as Powers of 10
  Standard Form