Chapter 12 Exponents and Powers

Very Short Answer Type

Question 1.
Find the multiplicative inverse of:
(i)
(ii)
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q1

Question 2.
Expand the following using exponents.
(i) 0.0523
(ii) 32.005
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q2
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q2.1

Question 3.
Simplify and write in exponential form.
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q3
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q3.1

Question 4.
Simplify the following and write in exponential form.
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q4
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q4.1

Question 5.
Express  as a power with the base 2.
Solution:

Question 6.
Simplify the following and write in exponential form.

Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q6

Question 7.

Question 8.
Simplify the following:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q8
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q8.1

Question 9.

Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q9

Question 10.
Write the following in standard form
(i) 0 0035
(ii) 365.05
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q10

Short Answer Type

Question 11.
Find the value of P if
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q11
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q11.1

Question 12.
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q12
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q12.1

Question 13.
Find the value of x if
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q13
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q13.1
⇒ 3 + x = 18 [Equating the powers of same base]
x = 18 – 3 = 15

Question 14.

Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q14

Question 15.
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q15
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q15.1

Question 16.
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q16
Solution:
Exponents and Powers Class 8 Extra Questions Maths Chapter 12 Q16.1

Question 17.

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Chapter 12 Exponents and Powers