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Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8

Document Description: Important Questions: Exponents and Powers for Class 8 2022 is part of Mathematics (Maths) Class 8 preparation. The notes and questions for Important Questions: Exponents and Powers have been prepared according to the Class 8 exam syllabus. Information about Important Questions: Exponents and Powers covers topics like and Important Questions: Exponents and Powers Example, for Class 8 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Important Questions: Exponents and Powers.

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Question 1: Find the value of:  Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Solution:
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8

Question 2:  Simplify:  Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8

Solution:  

Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
         
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Thuss,
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8

Question 3: Find the value of m when Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Solution: We have
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Since base is same on both sides, then their exponents are same.
∴ m – 5 = 3
⇒ m = 3 + 5 = 8
Thus, the required value of m is 8.

Question 4: Simplify:  Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Solution:
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Question 5: Write the following in standard form:
(i) 0.000000456 and (ii) 34500000.

Solution: We have
Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
                          Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
Thus, 0.000000456 = 4.56 * 10–7

(ii) 34500000 = 345 * 100000
= 3.45 * 100 * 100000
= 3.45 * 102 * 105 = 3.45 * 102+5
= 3.45 * 107
Thus, 34500000 = 3.45 * 107

Question 6: Express 2.0001 * 109 in usual form.
Solution: We have
           Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8
                               = 20001 * 100000
                               = 2000100000
Thus, 2.0001 * 109 = 2000100000

The document Important Questions: Exponents and Powers Notes | Study Mathematics (Maths) Class 8 - Class 8 is a part of the Class 8 Course Mathematics (Maths) Class 8.
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