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
4
5
is
(i)
5
4
(ii)
5
-4
(iii)
(
-4
5
)
(iv)
0
(v)
(
-1
4
5
)
Question
2
2.
The multiplicative inverse of
(
-4
3
)
is
(i)
(
-2
3
4
)
(ii)
(
-1
3
4
)
(iii)
1
4
(iv)
1
1
4
(v)
(
-3
4
)
Question
3
3.
The additive inverse of
1
4
is
(i)
0
(ii)
(
-1
1
4
)
(iii)
4
1
(iv)
(
-1
4
)
(v)
4
-1
Question
4
4.
The multiplicative inverse of
2
7
is
(i)
4
1
2
(ii)
7
2
(iii)
5
1
2
(iv)
1
1
2
(v)
2
1
2
Question
5
5.
The additive inverse of
(
-6
5
)
is
(i)
5
-6
(ii)
6
5
(iii)
0
(iv)
5
6
(v)
1
5
Question
6
6.
The multiplicative inverse of
5
7
is
(i)
2
5
(ii)
(
-3
5
)
(iii)
7
5
(iv)
3
2
5
(v)
2
2
5
Question
7
7.
Which of the following are true?
a)
17
2
÷
146
19
=
146
19
÷
17
2
b)
3
7
✕
146
19
=
146
19
✕
3
7
c)
3
7
+
31
15
=
31
15
+
3
7
d)
17
2
−
31
15
=
31
15
−
17
2
(i)
{a,d,b}
(ii)
{b,c}
(iii)
{a,c,b}
(iv)
{a,b}
(v)
{d,c}
Question
8
8.
Which of the following are true?
a)
14
3
+
(
16
3
+
10
11
)
=
(
14
3
+
16
3
)
+
10
11
b)
14
3
✕
(
23
15
✕
4
7
)
=
(
14
3
✕
23
15
)
✕
4
7
c)
10
19
÷
(
23
15
÷
8
17
)
=
(
10
19
÷
23
15
)
÷
8
17
d)
10
19
−
(
16
3
−
2
5
)
=
(
10
19
−
16
3
)
−
2
5
(i)
{a,b}
(ii)
{d,b}
(iii)
{c,b,a}
(iv)
{c,a}
(v)
{c,d,a}
Question
9
9.
Which of the following are true?
a)
19
6
✕
(
17
5
+
1
13
)
=
(
19
6
✕
17
5
)
+
(
19
6
✕
1
13
)
b)
18
11
÷
(
17
5
+
20
9
)
=
(
18
11
÷
17
5
)
+
(
18
11
÷
20
9
)
c)
19
6
✕
(
108
13
−
16
17
)
=
(
19
6
✕
108
13
)
−
(
19
6
✕
16
17
)
d)
18
11
−
(
108
13
✕
8
19
)
=
(
18
11
−
108
13
)
✕
(
18
11
−
8
19
)
(i)
{b,d,a}
(ii)
{b,a}
(iii)
{b,c,a}
(iv)
{a,c}
(v)
{d,c}
Question
10
10.
Which of the following are true?
a)
2
11
−
8
3
=
8
3
−
2
11
b)
7
13
+
8
3
=
8
3
+
7
13
c)
2
11
÷
98
19
=
98
19
÷
2
11
d)
7
13
✕
98
19
=
98
19
✕
7
13
(i)
{c,d}
(ii)
{a,b}
(iii)
{b,d}
(iv)
{a,c,b}
(v)
{a,d,b}
Question
11
11.
Which of the following are true?
a)
8
11
✕
(
131
15
✕
4
13
)
=
(
8
11
✕
131
15
)
✕
4
13
b)
8
11
+
(
17
3
+
14
3
)
=
(
8
11
+
17
3
)
+
14
3
c)
17
9
−
(
17
3
−
20
17
)
=
(
17
9
−
17
3
)
−
20
17
d)
17
9
÷
(
131
15
÷
3
13
)
=
(
17
9
÷
131
15
)
÷
3
13
(i)
{c,a}
(ii)
{a,b}
(iii)
{d,b}
(iv)
{c,d,a}
(v)
{c,b,a}
Question
12
12.
Which of the following are true?
a)
11
5
✕
(
72
17
−
5
4
)
=
(
11
5
✕
72
17
)
−
(
11
5
✕
5
4
)
b)
14
3
−
(
72
17
✕
19
8
)
=
(
14
3
−
72
17
)
✕
(
14
3
−
19
8
)
c)
14
3
÷
(
41
12
+
7
18
)
=
(
14
3
÷
41
12
)
+
(
14
3
÷
7
18
)
d)
11
5
✕
(
41
12
+
9
4
)
=
(
11
5
✕
41
12
)
+
(
11
5
✕
9
4
)
(i)
{b,d,a}
(ii)
{b,c,a}
(iii)
{c,d}
(iv)
{a,d}
(v)
{b,a}
Question
13
13.
Which of the following are true?
a)
7
10
÷
23
5
=
23
5
÷
7
10
b)
7
10
−
49
16
=
49
16
−
7
10
c)
9
14
+
49
16
=
49
16
+
9
14
d)
9
14
✕
23
5
=
23
5
✕
9
14
(i)
{c,d}
(ii)
{a,c}
(iii)
{a,b,c}
(iv)
{b,d}
(v)
{a,d,c}
Question
14
14.
Which of the following are true?
a)
15
19
+
(
97
9
+
6
11
)
=
(
15
19
+
97
9
)
+
6
11
b)
15
19
✕
(
83
17
✕
19
16
)
=
(
15
19
✕
83
17
)
✕
19
16
c)
11
17
÷
(
83
17
÷
5
16
)
=
(
11
17
÷
83
17
)
÷
5
16
d)
11
17
−
(
97
9
−
5
16
)
=
(
11
17
−
97
9
)
−
5
16
(i)
{a,b}
(ii)
{c,d,a}
(iii)
{c,b,a}
(iv)
{c,a}
(v)
{d,b}
Question
15
15.
Which of the following are true?
a)
13
4
✕
(
41
10
−
13
6
)
=
(
13
4
✕
41
10
)
−
(
13
4
✕
13
6
)
b)
2
5
−
(
41
10
✕
20
3
)
=
(
2
5
−
41
10
)
✕
(
2
5
−
20
3
)
c)
13
4
✕
(
137
18
+
5
12
)
=
(
13
4
✕
137
18
)
+
(
13
4
✕
5
12
)
d)
2
5
÷
(
137
18
+
8
11
)
=
(
2
5
÷
137
18
)
+
(
2
5
÷
8
11
)
(i)
{b,c,a}
(ii)
{a,c}
(iii)
{d,c}
(iv)
{b,d,a}
(v)
{b,a}
Assignment Key
1) (iii)
2) (v)
3) (iv)
4) (ii)
5) (ii)
6) (iii)
7) (ii)
8) (i)
9) (iv)
10) (iii)
11) (ii)
12) (iv)
13) (i)
14) (i)
15) (ii)
