#### Chapters

Chapter 2 - Linear Equations in One Variable

Chapter 3 - Understanding Quadrilaterals

Chapter 4 - Practical Geometry

Chapter 5 - Data Handling

Chapter 6 - Squares and Square Roots

Chapter 7 - Cubes and Cube Roots

Chapter 8 - Comparing Quantities

Chapter 9 - Algebraic Expressions and Identities

Chapter 10 - Visualising Solid Shapes

Chapter 11 - Mensuration

Chapter 12 - Exponents and Powers

Chapter 13 - Direct and Inverse Proportions

Chapter 14 - Factorisation

Chapter 15 - Introduction to Graphs

Chapter 16 - Playing with Numbers

## Chapter 12 - Exponents and Powers

#### Pages 197 - 198

Evaluate 3^{−2}

Evaluate (−4)^{−2}

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

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

(-4)^{5} ÷ (-4)^{8}

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

`(1/2^3)^2`

Find the value of (3^{−1} + 4^{−1} + 5^{−1})^{0}

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

Find the value of *m* for which 5^{m} ÷5^{−3} = 5^{5}.

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

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

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

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

#### Page 200

Express the given numbers in standard form.

0.0000000000085

Express the given numbers in standard form.

0.00000000000942

Express the given numbers in standard form.

6020000000000000

Express the given numbers in standard form.

0.00000000837

Express the given numbers in standard form.

31860000000

Express the given numbers in usual form.

3.02 × 10^{−6}

Express the given numbers in usual form.

4.5 × 10^{4}

Express the given numbers in usual form

3 × 10^{−8}

Express the given numbers in standard form.

1.0001 × 10^{9}

Express the given numbers in standard form.

5.8 × 10^{12 }

Express the given numbers in standard form.

5.8 × 10^{12 }

Express the given numbers in standard form.

3.61492 × 10^{6}

Express the number appearing in the given statements in standard form

1 micron is equal to `1/1000000` m

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.

Express the number appearing in the given statements in standard form

Size of a bacteria is 0.0000005 m

Express the number appearing in the given statements in standard form

Size of a plant cell is 0.00001275 m

Express the number appearing in the given statements in standard form

Thickness of a thick paper is 0.07 mm

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?