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NCERT solutions Mathematics Class 8 chapter 12 Exponents and Powers

Chapters

NCERT Mathematics Class 8

Mathematics Textbook for Class 8

Chapter 12 - Exponents and Powers

Pages 197 - 198

Evaluate 3−2

Q 1.1 | Page 197

Evaluate (−4)−2

Q 1.2 | Page 197

Evaluate `(1/2)^(-5)`

Q 1.3 | Page 197

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

(-4)5 ÷ (-4)8

Q 2.1 | Page 197

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

`(1/2^3)^2`

Q 2.2 | Page 197

Find the value of (3−1 + 4−1 + 5−1)0

Q 3.4 | Page 197

Find the value of `{((-2)/3)^(-2)}^2`

Q 3.5 | Page 197

Find the value of m for which 5m ÷5−3 = 55.

Q 5 | Page 198

Evaluate  `{(1/3)^(-1) - (1/4)^(-1)}^(-1)`

Q 6.1 | Page 198

Evaluate `(5/8)^(-7) xx (8/5)^(-4)`

Q 6.2 | Page 198

Simplify `(25 xx t^(-4))/(5^(-3) xx10xxt^(-5)) (t != 0)`

Q 7.1 | Page 198

Simplify `(3^(-5) xx 10^(-5) xx 125)/(5^(-7) xx 6^(-5))`

Q 7.2 | Page 198

Page 200

Express the given numbers in standard form.

0.0000000000085

Q 1.1 | Page 200

Express the given numbers in standard form.

0.00000000000942

Q 1.2 | Page 200

Express the given numbers in standard form.

6020000000000000

Q 1.3 | Page 200

Express the given numbers in standard form.

0.00000000837

Q 1.4 | Page 200

Express the given numbers in standard form.

31860000000

Q 1.5 | Page 200

Express the given numbers in usual form.

3.02 × 10−6

 

Q 2.1 | Page 200

Express the given numbers in usual form.

4.5 × 104

Q 2.2 | Page 200

Express the given numbers in usual form

3 × 10−8

Q 2.3 | Page 200

Express the given numbers in standard form.

1.0001 × 109

Q 2.4 | Page 200

Express the given numbers in standard form.

5.8 × 1012

Q 2.5 | Page 200

Express the given numbers in standard form.

5.8 × 1012

Q 2.5 | Page 200

Express the given numbers in standard form.

3.61492 × 106

Q 2.6 | Page 200

Express the number appearing in the given statements in standard form

1 micron is equal to `1/1000000` m

Q 3.1 | Page 200

Express the number appearing in the given statements in standard form

Charge of an electron is 0.000, 000, 000, 000, 000, 000, 16 coulomb.

Q 3.2 | Page 200

Express the number appearing in the given statements in standard form

Size of a bacteria is 0.0000005 m

Q 3.3 | Page 200

Express the number appearing in the given statements in standard form

Size of a plant cell is 0.00001275 m

Q 3.4 | Page 200

Express the number appearing in the given statements in standard form

Thickness of a thick paper is 0.07 mm

Q 3.5 | Page 200

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?

Q 4 | Page 200

NCERT Mathematics Class 8

Mathematics Textbook for Class 8
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