NCERT Solutions for Class 7 Maths Chapter 13 Exponents and Powers Ex 13.1

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NCERT Solutions for Class 7 Maths Chapter 13 Exponents and Powers Ex 13.1

NCERT TEXTBOOK EXERCISES

Question 1. Find the value of:

1. 26
2. 93
3. 112
4. 54.

Solution:

1. 26 = 2 × 2 × 2 × 2 × 2 × 2 = 64
2. 93 = 9 × 9 × 9 = 729
3. 112 = 11 × 11 = 121
4. 54 = 5 × 5 × 5 × 5 = 625.

Question 2. Express the following in exponential form:

1. 6 × 6 × 6 × 6
2. t × t
3. b × b × b × b
4. 5 × 5 × 7 × 7 × 7
5. 2 × 2 × a × a
6. a × a × a × c × c × c × c × d.

Solution:

1. 6 × 6 × 6 × 6 = 64
2. t × t = t2
3. b × b × b × b = b4
4. 5 × 5 × 7 × 7 × 7 = 52 × 73
5. 2 × 2 × a × a = 22 × a2
6. a × a × a × c × c × c × c × d = a3 × c4 × d.

Question 3. Express each of the following numbers using the exponential notation:

(i) 512
(ii) 343
(iii) 729
(iv) 3125.

Solution:

Question 4. Identify wherever possible, in each of the following?

Solution:

Question 5. Express each of the following as a product of powers of their prime factors:

(i) 648
(ii) 405
(iii) 540
(iv) 3600

Solution:

Question 6. Simplify:

Solution:

Question 7. Simplify:

Solution:

Question 8. Compare the following numbers:

Solution:

NCERT Solutions for Class 7 Maths Chapter 13 Exponents and Powers Ex 13.1 PDF

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