Exponents And Powers Worksheets - Class 8, National Council Of Educational Research And Training Page 11
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36U N I T - 8
4
⎛ ⎞
5
⎜ ⎟
51. By multiplying
by ________ we get 5
4
.
⎝ ⎠
3
÷ 3
52. 3
5
–6
can be simplified as __________.
53. The value of 3 × 10¯
7
is equal to ________.
54. To add the numbers given in standard form, we first convert them
into numbers with __ exponents.
55. The standard form for 32,50,00,00,000 is __________.
56. The standard form for 0.000000008 is __________.
-10
57. The usual form for 2.3 × 10
is ____________.
5
58. On dividing 8
by _________ we get 8.
–5
5
59. On multiplying _________ by 2
we get 2
.
–1
–1
2
60. The value of [3
× 4
]
is _________.
61. The value of [2
–1
× 3
–1
]
–1
is _________.
62. By solving (6
0
– 7
0
) × (6
0
+ 7
0
) we get ________.
63. The expression for 3
5
with a negative exponent is _________.
÷ 7
6
6
64. The value for (–7)
is _________.
–2
–2
–2
2
65. The value of [1
+ 2
+ 3
] × 6
is ________ .
In questions 66 to 90, state whether the given statements are true (T)
or false (F).
–2
–2
66. The multiplicative inverse of (– 4)
is (4)
.
−
2
2
⎛ ⎞
⎛ ⎞
3
2
⎜ ⎟
⎜ ⎟
67. The multiplicative inverse of
is not equal to
.
⎝ ⎠
⎝ ⎠
2
3
1
68. 10
–2
=
100
69. 24.58 = 2 × 10 + 4 × 1 + 5 × 10 + 8 × 100
70. 329.25 = 3 × 10
2
+ 2 × 10
1
+ 9 × 10
0
+ 2 × 10
–1
+ 5 × 10
–2
71. (–5)
–2
× (–5)
–3
= (–5)
–6
72. (–4)
–4
× (4)
–1
= (4)
5
E E E E E
P P P P P
255
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255
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255
XPONENTS
XPONENTS
AND
AND
OWERS
OWERS
XPONENTS
XPONENTS
XPONENTS AND
AND
AND
OWERS
OWERS
OWERS
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