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NCERT Solutions for Class 7 Maths Chapter 13 Exponents & Powers Exercise 13.3 is provided in a downloadable PDF format. Powers and Exponents are majorly used in scientific calculations. To represent a very large number, exponents can be used.
Eg: 1800000000 can be represented as 18 x 10⁸
Similarly, powers are also used to represent square root, cube roots and scientific notation.
Eg: 625 is a square of 25, therefore it can be represented as 25².
Download PDF: NCERT Solutions for Class 7 Maths Chapter 13 Exercise 13.3
Check other NCERT Solutions for Class 7 Maths Chapter 13:
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Examples of Class 7 Chapter 13 Exponents & Powers
Ques 1. Represent 0.000000067 in scientific notation.
Ans. Scientific notation is always represented in terms of 10.
Therefore,
0.000000067 = 67 x 10⁻⁹
Ques 2. Represent 7800000 in scientific notation.
Ans. Scientific notation is always represented in terms of 10. Since the number is positive, no negativ sign is to be included in the power.
Therefore,
7800000 = 78 x 10⁵
Read More:
| Difference between power and exponent | Scientific Notation Formula | Exponent Powers |
| Uses of Exponents to Express small numbers in Standard Form | Powers and Negative Exponent | Standard Form Formula |
Class 7 Maths Guides:
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