Chapter 13 Class 7 Exponents and Powers

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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 (a^m × aⁿ = a^{m + n} )
  • Dividing Powers with the Same Base (a^m ÷ aⁿ = a^{m - n} )
  • Taking power of power ( (a^m)ⁿ = a^{m × n} )
  • Dividing Powers with the Same Exponents (a^m ÷ b^m = (a/b)^m
  • Numbers with exponent zero (a⁰ = 1)
• Expressing numbers in Standard Form

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