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

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