# Ncert Solutions for Exponents Class 8 CBSE Part 2

Ncert Solutions Assignments

In this page we have NCERT book Solutions for Class 8th Maths:Exponents for EXERCISE 2 . Hope you like them and do not forget to like , social share and comment at the end of the page.

Question 1

Express the following numbers in standard form.

1. 0.0000000000085
2. 0.00000000000942
3. 6020000000000000
4. 0.00000000837
5. 31860000000

1. 0.0000000000085

=8.5 ×10-12

2. 0.00000000000942

=9.42×10-12

3. 6020000000000000

=6.02×1015

4. 0.00000000837

=8.37 ×10-9

5. 31860000000

=3.186×1010

Question 2

Express the following numbers in usual form.

1. 3.02 x 10-6
2. 4.5 x 104
3. 3 x 10-8
4. 1.0001 x 109
5. 5.8 x 1012
6. 3.61492 x 106

1. 3.02 x 10-6

= .00000302

2. 4.5 x 104

=45000

3. 3 x 10-8

=.00000003

4. 1.0001 x 109

=1000100000

5. 5.8 x 1012

=5800000000000

6. 3.61492 x 106

=3614920

Question 3

Express the number appearing in the following statements in standard form.

(i) 1 micron is equal to 1/1000000 m.

(ii) Charge of an electron is 0.000, 000, 000, 000, 000, 000, 16 coulomb.

(iii) Size of bacteria is 0.0000005 m

(iv)  Size of a plant cell is 0.00001275 m

(v) Thickness of a thick paper is 0.07 mm

1. 1/1000000

=1×10-6

2. 0.000, 000, 000, 000, 000, 000, 16

=1.6 ×10-19

3. 0.0000005

=5 ×10-7

4.  0.00001275

=1.275 ×10-5

5.     0.07

=7×10-2

Question 4

In a stack there are 5 books each of thickness 20 mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack?

Total thickness

=5×20  + 5X.016

=100  + 5× 1.6 ×10-2

=100  + .08

=100.08 mm