EduSahara™ Assignment
Name : Rational Number Properties
Chapter : Rational and Irrational Numbers
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
The additive inverse of
1
3
is
(i)
3
1
(ii)
3
-1
(iii)
(
-1
1
3
)
(iv)
(
-1
3
)
(v)
0
Question
2
2.
The multiplicative inverse of
(
-1
2
)
is
(i)
0
(ii)
-3
(iii)
-4
(iv)
-1
(v)
-2
1
Question
3
3.
The additive inverse of
7
5
is
(i)
0
(ii)
5
7
(iii)
(
-2
2
5
)
(iv)
5
-7
(v)
(
-7
5
)
Question
4
4.
The multiplicative inverse of
(
-8
5
)
is
(i)
1
3
8
(ii)
3
8
(iii)
(
-2
5
8
)
(iv)
(
-1
5
8
)
(v)
(
-5
8
)
Question
5
5.
The additive inverse of
6
7
is
(i)
(
-1
6
7
)
(ii)
7
-6
(iii)
0
(iv)
(
-6
7
)
(v)
7
6
Question
6
6.
The multiplicative inverse of
1
9
is
(i)
10
(ii)
11
(iii)
7
(iv)
9
1
(v)
8
Question
7
7.
Which of the following are true?
a)
11
2
+
81
14
=
81
14
+
11
2
b)
1
5
−
81
14
=
81
14
−
1
5
c)
11
2
✕
161
19
=
161
19
✕
11
2
d)
1
5
÷
161
19
=
161
19
÷
1
5
(i)
{b,c,a}
(ii)
{b,d,a}
(iii)
{a,c}
(iv)
{b,a}
(v)
{d,c}
Question
8
8.
Which of the following are true?
a)
8
15
÷
(
89
18
÷
8
9
)
=
(
8
15
÷
89
18
)
÷
8
9
b)
9
19
+
(
17
8
+
15
17
)
=
(
9
19
+
17
8
)
+
15
17
c)
8
15
−
(
17
8
−
11
3
)
=
(
8
15
−
17
8
)
−
11
3
d)
9
19
✕
(
89
18
✕
8
7
)
=
(
9
19
✕
89
18
)
✕
8
7
(i)
{c,d}
(ii)
{b,d}
(iii)
{a,d,b}
(iv)
{a,c,b}
(v)
{a,b}
Question
9
9.
Which of the following are true?
a)
5
17
−
(
17
14
✕
12
17
)
=
(
5
17
−
17
14
)
✕
(
5
17
−
12
17
)
b)
10
3
✕
(
17
14
−
2
7
)
=
(
10
3
✕
17
14
)
−
(
10
3
✕
2
7
)
c)
5
17
÷
(
144
19
+
7
9
)
=
(
5
17
÷
144
19
)
+
(
5
17
÷
7
9
)
d)
10
3
✕
(
144
19
+
11
17
)
=
(
10
3
✕
144
19
)
+
(
10
3
✕
11
17
)
(i)
{b,d}
(ii)
{a,b}
(iii)
{c,d}
(iv)
{a,c,b}
(v)
{a,d,b}
Question
10
10.
Which of the following are true?
a)
18
5
−
36
5
=
36
5
−
18
5
b)
1
2
+
36
5
=
36
5
+
1
2
c)
18
5
÷
160
17
=
160
17
÷
18
5
d)
1
2
✕
160
17
=
160
17
✕
1
2
(i)
{a,c,b}
(ii)
{b,d}
(iii)
{a,b}
(iv)
{c,d}
(v)
{a,d,b}
Question
11
11.
Which of the following are true?
a)
14
15
÷
(
59
18
÷
11
15
)
=
(
14
15
÷
59
18
)
÷
11
15
b)
8
9
✕
(
59
18
✕
1
9
)
=
(
8
9
✕
59
18
)
✕
1
9
c)
14
15
−
(
92
9
−
18
19
)
=
(
14
15
−
92
9
)
−
18
19
d)
8
9
+
(
92
9
+
1
13
)
=
(
8
9
+
92
9
)
+
1
13
(i)
{a,b}
(ii)
{c,d}
(iii)
{a,c,b}
(iv)
{a,d,b}
(v)
{b,d}
Question
12
12.
Which of the following are true?
a)
5
9
✕
(
157
17
−
20
13
)
=
(
5
9
✕
157
17
)
−
(
5
9
✕
20
13
)
b)
5
9
✕
(
145
19
+
7
5
)
=
(
5
9
✕
145
19
)
+
(
5
9
✕
7
5
)
c)
13
6
−
(
157
17
✕
11
10
)
=
(
13
6
−
157
17
)
✕
(
13
6
−
11
10
)
d)
13
6
÷
(
145
19
+
3
10
)
=
(
13
6
÷
145
19
)
+
(
13
6
÷
3
10
)
(i)
{d,b}
(ii)
{a,b}
(iii)
{c,d,a}
(iv)
{c,b,a}
(v)
{c,a}
Question
13
13.
Which of the following are true?
a)
19
6
−
68
9
=
68
9
−
19
6
b)
19
6
÷
86
15
=
86
15
÷
19
6
c)
19
4
✕
86
15
=
86
15
✕
19
4
d)
19
4
+
68
9
=
68
9
+
19
4
(i)
{c,d}
(ii)
{b,d}
(iii)
{a,c}
(iv)
{a,d,c}
(v)
{a,b,c}
Question
14
14.
Which of the following are true?
a)
10
7
÷
(
31
3
÷
15
11
)
=
(
10
7
÷
31
3
)
÷
15
11
b)
19
13
✕
(
31
3
✕
5
14
)
=
(
19
13
✕
31
3
)
✕
5
14
c)
19
13
+
(
101
11
+
19
17
)
=
(
19
13
+
101
11
)
+
19
17
d)
10
7
−
(
101
11
−
13
12
)
=
(
10
7
−
101
11
)
−
13
12
(i)
{a,d,b}
(ii)
{a,c,b}
(iii)
{b,c}
(iv)
{d,c}
(v)
{a,b}
Question
15
15.
Which of the following are true?
a)
7
20
÷
(
35
3
+
13
19
)
=
(
7
20
÷
35
3
)
+
(
7
20
÷
13
19
)
b)
18
13
✕
(
35
3
+
17
11
)
=
(
18
13
✕
35
3
)
+
(
18
13
✕
17
11
)
c)
7
20
−
(
49
10
✕
1
7
)
=
(
7
20
−
49
10
)
✕
(
7
20
−
1
7
)
d)
18
13
✕
(
49
10
−
9
19
)
=
(
18
13
✕
49
10
)
−
(
18
13
✕
9
19
)
(i)
{a,d,b}
(ii)
{a,c,b}
(iii)
{a,b}
(iv)
{c,d}
(v)
{b,d}
Assignment Key
1) (iv)
2) (v)
3) (v)
4) (v)
5) (iv)
6) (iv)
7) (iii)
8) (ii)
9) (i)
10) (ii)
11) (v)
12) (ii)
13) (i)
14) (iii)
15) (v)
