Exponents and Power (Mathematics) Class 8 - NCERT Questions

Evaluate.

Q 2.

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

Q 3.

Find the value of

Q 4.

Evaluate

Q 5.

SOLUTION:

Q 6.

Evaluate

Q 7.

Simplify

Q 8.

Express the following numbers in standard form.

(i) 0.0000000000085

(ii) 0.00000000000942

(iii) 6020000000000000

(iv) 0.00000000837

(v) 31860000000

Q 9.

Express the following numbers in usual form.

Q 10.

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

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

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

(iii) Size of a 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.

Q 11.

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.

SOLUTION: