NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Ex 12.1

These NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Ex 12.1 Questions and Answers are prepared by our highly skilled subject experts.

NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Exercise 12.1

Question 1.
Evaluate

Question 2.
Simplify and express the result in power notation with positive exponent.

Answer:

Question 3.
Find the value of

Question 4.
Evaluate:

Question 5.
Find the value of m for which 5m ÷ 5 3 = 55.
Answer:
5^m ÷ 5^-3 = 5⁵
5^m ÷ 153 = 5⁵
5^m × 5³ = 5⁵
5^m+3 = 5⁵ (a^m × aⁿ = a^m+n)
∴ m + 3 = 5 (since the bases are equal, the exponents are equal)
m = 5 – 3
m = 2
The value of m = 2.

Question 6.
Evaluate

Question 7.
Simplify: