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
)