Class 8 Maths EXPONENTS 2017 18

INDIAN SCHOOL MUSCAT – MIDDLE SECTION – DEPARTMENT OF MATHEMATICS – TERM :02 ( 2017– 18 ) NAME OF THE STUDENT : CLASS :...

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INDIAN SCHOOL MUSCAT – MIDDLE SECTION – DEPARTMENT OF MATHEMATICS – TERM :02 ( 2017– 18 ) NAME OF THE STUDENT :

CLASS :8

TOPIC: EXPONENTS AND POWERS

SEC :

SUB: MATHEMATICS

WORKSHEET NO: 3

DATE :20.11.2017

QUESTIONS S.NO

Express the following in the standard form: 1

2

(a) 0.000 000 000 000 075 (b) 698 200 000 000 000 000 Express the following in usual form: 7 5 (a) 3.52 10 (b) 6 10

(c) 678 456 012 6

(c)

7.054 10

(c)

(4

.

Evaluate the following: 3

3

(a)

2

1

5 5 5 3

5 (b)   2

2

2

1 (c)    2

2

 2    3

2

 2   5

Find the value of ‘m’ in each of the following if : 4.

(a)

3  3  3 m 1

5

7

(b)

2

3 m 1

1

1



 10  7  6

Simplify the following and express the answer in power notation: 5

5.

6.

(a)

3  2  7 (b) 4  49  9 4

2  m  3  32 9 4 m 4

2

5

9

3 By which number should   7

6

2

4

2

2

4

3 be multiplied to get   7

as product.

Express each of the following as product of its prime factors only in exponential form. 7 8

(a) 729 × 64

(b)

Write exponential form for 81 × 27× 243 taking 3 as base. 2

9

128 250

1 (a)    4

Evaluate:

0

1    50 

3

1 (b) 335     2 0

Write the reciprocal of the following with positive exponent: 5

10

3 (a)   7

 4  (b)    9 

7

5

2

1

5 6

1

)