Exponents And Powers Worksheets - Class 8, National Council Of Educational Research And Training Page 10
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35
36M A T H E M A T I C S
0
36. 5
= __________.
5
–5
37. 5
× 5
= __________.
2
⎛
⎞
1
⎜
⎟
38. The value of
is equal to _________.
3
⎝
⎠
2
39. The expression for 8
–2
as a power with the base 2 is _________.
40. Very small numbers can be expressed in standard form by using
_________ exponents.
41. Very large numbers can be expressed in standard form by using
_________ exponents.
5
–10
42. By multiplying (10)
by (10)
we get ________.
3
⎡
⎤
–6
3
–9
⎛
⎞
⎛
⎞
⎛
⎞
2
2
2
÷
×
=
⎢
⎥
_______
⎜
⎟
⎜
⎟
⎜
⎟
43.
⎝
⎠
⎝
⎠
⎝
⎠
⎢
13
13
⎥
13
⎣
⎦
44. Find the value [4
–1
+3
–1
+ 6
–2
]
–1
.
–1
–1
–1
0
45. [2
+ 3
+ 4
]
= ______
⎛
⎞
1
⎜
⎟
46. The standard form of
is ______.
⎝
⎠
100000000
47. The standard form of 12340000 is ______.
48. The usual form of 3.41 × 10
6
is _______.
6
49. The usual form of 2.39461 × 10
is _______.
1
2
50. If 36 = 6 × 6 = 6
, then
expressed as a power with the base 6 is
36
________.
Key
Key
Key
Concept
Concept
Concept
Key
Key
Concept
Concept
Scientific Notation
n
A number is written in scientific notation if it has the form c × 10
where
c > 1, c < 10, and n is an integer.
Standard form
Product form
Scientific notation
325,000
3.25 × 100,000
3.25 × 10
5
–4
0.0005
5 × 0.0001
5 × 10
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