ML Aggarwal Class 7 Solutions for ICSE Maths Chapter 4 Exponents and Powers Ex 4.2

ML Aggarwal Class 7 Solutions Chapter 4 Exponents and Powers Ex 4.2 for ICSE Understanding Mathematics acts as the best resource during your learning and helps you score well in your exams.

ML Aggarwal Class 7 Solutions for ICSE Maths Chapter 4 Exponents and Powers Ex 4.2

Question 1.
Using laws of exponents, simplify and write the following in the exponential form:

Solution:

Question 2.
Simplify and write the following in the exponential form:
(i) 5³ × 5⁷ × 5¹²
(ii) a⁵ × a³ × a⁷
(iii) (7¹² × 7³) ÷ 7⁴
Solution:

Question 3.
Simplify and write the following in the exponential form:
(i) (2²)¹⁰⁰
(ii) ((-7)⁶)⁵
(iii) (3²)⁵ × (3⁴)⁷
Solution:

Question 4.
Simplify and write in the exponential form:

Solution:

Question 5.
Simplify and write in the exponential form:

Solution:

Question 6.
Simplify and express each of the following in the exponential form:

Solution:

Question 7.
Express each of the following rational numbers in the exponential form:

Solution:

Question 8.
Simplify the following:

Solution:

Question 9.
Simplify the following:

Solution:

Question 10.
Simplify the following:

Solution:

Question 11.
Simplify:

Solution:

Question 12.
Express each of the following as a product of prime factors in the exponential form:
(i) 108 × 192
(ii) 729 × 64
(iii) 384 × 147
Solution:

Question 13.
Simplify and write the following in the exponential form:
(i) 3³ × 2² + 2² × 5⁰
(ii) 9² + 11² – 2² × 3 × 17⁰
Solution:

Question 14.
(i) By what number should we multiply 3⁴ so that the product is 3⁷?
(ii) By what number should be multiple (-6)^-1 so that the product is 10^-1?
Solution:

Question 15.

Solution: