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# NCERT solutions for Class 8 Mathematics chapter 12 - Exponents and Powers

## Chapter 12 : Exponents and Powers

#### Pages 197 - 198

Q 1.1 | Page 197

Evaluate 3−2

Q 1.2 | Page 197

Evaluate (−4)−2

Q 1.3 | Page 197

Evaluate (1/2)^(-5)

Q 2.1 | Page 197

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

(-4)5 ÷ (-4)8

Q 2.2 | Page 197

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

(1/2^3)^2

Q 3.4 | Page 197

Find the value of (3−1 + 4−1 + 5−1)0

Q 3.5 | Page 197

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

Q 5 | Page 198

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

Q 6.1 | Page 198

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

Q 6.2 | Page 198

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

Q 7.1 | Page 198

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

Q 7.2 | Page 198

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

#### Page 200

Q 1.1 | Page 200

Express the given numbers in standard form.

0.0000000000085

Q 1.2 | Page 200

Express the given numbers in standard form.

0.00000000000942

Q 1.3 | Page 200

Express the given numbers in standard form.

6020000000000000

Q 1.4 | Page 200

Express the given numbers in standard form.

0.00000000837

Q 1.5 | Page 200

Express the given numbers in standard form.

31860000000

Q 2.1 | Page 200

Express the given numbers in usual form.

3.02 × 10−6

Q 2.2 | Page 200

Express the given numbers in usual form.

4.5 × 104

Q 2.3 | Page 200

Express the given numbers in usual form

3 × 10−8

Q 2.4 | Page 200

Express the given numbers in standard form.

1.0001 × 109

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.

5.8 × 1012

Q 2.6 | Page 200

Express the given numbers in standard form.

3.61492 × 106

Q 3.1 | Page 200

Express the number appearing in the given statements in standard form

1 micron is equal to 1/1000000 m

Q 3.2 | 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 3.3 | Page 200

Express the number appearing in the given statements in standard form

Size of a bacteria is 0.0000005 m

Q 3.4 | Page 200

Express the number appearing in the given statements in standard form

Size of a plant cell is 0.00001275 m

Q 3.5 | Page 200

Express the number appearing in the given statements in standard form

Thickness of a thick paper is 0.07 mm

Q 4 | 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?

## NCERT solutions for Class 8 Mathematics chapter 12 - Exponents and Powers

NCERT solutions for Class 8 Maths chapter 12 (Exponents and Powers) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Mathematics Textbook for Class 8 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at shaalaa.com are providing such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8 Mathematics chapter 12 Exponents and Powers are Powers with Negative Exponents, Laws of Exponents, Use of Exponents to Express Small Numbers in Standard Form, Comparing Very Large and Very Small Numbers.

Using NCERT Class 8 solutions Exponents and Powers exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 8 prefer NCERT Textbook Solutions to score more in exam.

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