EduSahara™ Worksheet
Name : Chapter Based Worksheet
Chapter : Exponents and Powers
Grade : CBSE Grade VII
License : Non Commercial Use
Question
1
1.
(
a
(-9)
+
b
(-9)
)
0
=
(i)
3
(ii)
0
(iii)
(-2)
(iv)
1
(v)
a
(-9)
+
b
(-9)
Question
2
2.
(
3
(-4)
)
-6
✕
(
4
3
)
-3
✕
(
5
(-3)
)
-4
(
3
4
)
6
✕
(
4
4
)
-3
✕
(
5
6
)
2
=
(i)
1
✕
4
4
✕
1
(ii)
1
✕
4
3
✕
1
(iii)
1
✕
4
3
✕
1
(iv)
1
✕
4
3
✕
1
Question
3
3.
0
1
=
(i)
undefined
(ii)
0
(iii)
-1
(iv)
∞
(v)
1
Question
4
4.
[
7
2
]
-4
=
(i)
7
-8
(ii)
7
-7
(iii)
7
-9
(iv)
4
-8
(v)
10
-8
Question
5
5.
Represent the given small number in scientific form
-0.05209433
(i)
-5.209433
✕
10
-3
(ii)
-5.209433
✕
10
-4
(iii)
-5.209433
✕
10
-2
(iv)
-5.209433
(v)
-5.209433
✕
10
-1
Question
6
6.
(
-7
✕
-4
✕
-3
)
7
=
(i)
(-7)
7
✕
(-2)
7
✕
(-1)
7
(ii)
(-7)
7
✕
(-4)
7
✕
(-3)
7
(iii)
(-7)
7
✕
(-4)
8
✕
(-3)
8
(iv)
(-7)
7
✕
(-4)
6
✕
(-3)
6
(v)
(-7)
7
✕
(-6)
7
✕
(-5)
7
Question
7
7.
The expanded form of
(
3
o
p
)
3
is
(i)
3
o
p
✕
3
o
p
✕
3
o
p
✕
3
o
p
✕
3
o
p
(ii)
3
o
p
✕
3
o
p
(iii)
3
o
p
✕
3
o
p
✕
3
o
p
(iv)
3
o
p
✕
3
o
p
✕
3
o
p
✕
3
o
p
(v)
3
o
p
Question
8
8.
The expanded form of
(
3
x
)
3
is
(i)
3
x
✕
3
x
(ii)
3
x
(iii)
3
x
✕
3
x
✕
3
x
✕
3
x
✕
3
x
(iv)
3
x
✕
3
x
✕
3
x
✕
3
x
(v)
3
x
✕
3
x
✕
3
x
Question
9
9.
(
v
3
3
w
4
)
-2
=
(i)
9
v
(-6)
w
4
(ii)
v
(-6)
9
w
(-8)
(iii)
9
v
w
2
(iv)
9
w
8
v
6
(v)
v
9
w
2
Question
10
10.
Simplify the expression
(-9)
2
✕
(-2)
2
(i)
18
2
(ii)
18
3
(iii)
21
2
(iv)
18
(v)
16
2
Question
11
11.
Simplify
2
2
✕
4
3
(-5)
-3
✕
(-3)
3
(i)
2
7
✕
5
3
3
3
(ii)
2
8
✕
5
3
0
(iii)
2
8
✕
5
3
3
3
(iv)
2
8
✕
5
3
6
3
(v)
2
9
✕
5
3
3
3
Question
12
12.
Find the exponential notation of
2
✕
2
✕
2
✕
2
✕
2
✕
2
✕
2
(i)
(-1)
7
(ii)
4
7
(iii)
2
6
(iv)
2
7
(v)
2
8
Question
13
13.
Simplify the expression
-7
(
-8
5
)
✕
-7
(
-8
5
)
(i)
-14
(
-8
5
)
(ii)
(-2)
-14
(iii)
-15
(
-8
5
)
(iv)
-13
(
-8
5
)
(v)
-14
(
-6
5
)
Question
14
14.
Simplify the expression
2
(
7
5
)
✕
2
(
5
3
)
✕
2
(
9
2
)
(i)
3
(
21
2
)
(ii)
2
(
19
2
)
(iii)
10
1
2
(iv)
2
(
21
2
)
(v)
2
(
23
2
)
Question
15
15.
Find the exponential notation of
64
49
(i)
2
(
10
7
)
(ii)
2
(
8
7
)
(iii)
2
(
6
7
)
(iv)
3
(
8
7
)
(v)
8
7
Question
16
16.
[
(
4
4
)
5
✕
(
4
6
)
6
]
÷
4
56
(i)
4
(ii)
0
(iii)
2
(iv)
1
Question
17
17.
(
−
2
s
2
t
5
)
3
=
(i)
−
6
s
6
t
15
(ii)
−
8
s
5
t
8
(iii)
−
2
s
6
t
15
(iv)
−
8
s
6
t
15
(v)
−
6
s
5
t
8
Question
18
18.
(
c
12
c
2
)
4
=
(i)
c
12
(ii)
c
14
(iii)
c
2
(iv)
4
c
40
(v)
c
40
Question
19
19.
(-6)
9
=
(i)
-9
(
-1
2
)
(ii)
-10
(
-1
6
)
(iii)
-8
(
-1
6
)
(iv)
-9
(
1
6
)
(v)
-9
(
-1
6
)
Question
20
20.
Represent the given small number in scientific form
0.0005381944
(i)
5.381944
✕
10
-5
(ii)
5.381944
✕
10
-3
(iii)
5.381944
✕
10
-6
(iv)
5.381944
✕
10
-4
(v)
5.381944
✕
10
-2
Question
21
21.
Represent the given large number in scientific form
7782295000000
(i)
7.782295
✕
10
11
(ii)
7.782295
✕
10
10
(iii)
7.782295
✕
10
13
(iv)
7.782295
✕
10
14
(v)
7.782295
✕
10
12
Question
22
22.
(
a
−
b
)
3
.
(
a
−
b
)
(-2)
=
(i)
(
a
−
b
)
(-6)
(ii)
(
a
−
b
)
(-2)
(iii)
(
a
−
b
)
(iv)
(
a
−
b
)
3
(v)
(
a
−
b
)
5
Question
23
23.
7
0
=
(i)
1
(ii)
0
(iii)
-1
(iv)
undefined
(v)
∞
Question
24
24.
Simplify the expression
3
-8
✕
7
-8
✕
6
-8
(i)
124
-8
(ii)
128
-8
(iii)
126
-7
(iv)
126
-8
(v)
126
-9
Question
25
25.
(
9
2
✕
7
4
✕
(
-3
8
)
)
4
=
(i)
4
(
9
2
)
✕
3
(
7
4
)
✕
3
(
-3
8
)
(ii)
4
(
9
2
)
✕
4
(
9
4
)
✕
4
(
-1
8
)
(iii)
4
(
9
2
)
✕
4
(
7
4
)
✕
4
(
-3
8
)
(iv)
4
(
9
2
)
✕
5
(
7
4
)
✕
5
(
-3
8
)
(v)
4
(
9
2
)
✕
4
(
5
4
)
✕
4
(
-5
8
)
Assignment Key
1) (iv)
2) (ii)
3) (ii)
4) (i)
5) (iii)
6) (ii)
7) (iii)
8) (v)
9) (iv)
10) (i)
11) (iii)
12) (iv)
13) (i)
14) (iv)
15) (ii)
16) (iv)
17) (iv)
18) (v)
19) (v)
20) (iv)
21) (v)
22) (iii)
23) (i)
24) (iv)
25) (iii)
