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
2
5
is
(i)
0
(ii)
5
2
(iii)
5
-2
(iv)
(
-2
5
)
(v)
(
-1
2
5
)
Question
2
2.
The multiplicative inverse of
8
9
is
(i)
2
1
8
(ii)
1
8
(iii)
9
8
(iv)
(
-7
8
)
(v)
3
1
8
Question
3
3.
The additive inverse of
(
-2
3
)
is
(i)
(
-1
3
)
(ii)
3
2
(iii)
0
(iv)
2
3
(v)
3
-2
Question
4
4.
The multiplicative inverse of
(
-6
5
)
is
(i)
1
6
(ii)
(
-2
5
6
)
(iii)
(
-5
6
)
(iv)
(
-1
5
6
)
(v)
1
1
6
Question
5
5.
The additive inverse of
5
8
is
(i)
8
5
(ii)
(
-1
5
8
)
(iii)
(
-5
8
)
(iv)
0
(v)
8
-5
Question
6
6.
The multiplicative inverse of
8
7
is
(i)
1
7
8
(ii)
(
-1
8
)
(iii)
7
8
(iv)
(
-1
1
8
)
(v)
2
7
8
Question
7
7.
Which of the following are true?
a)
16
3
+
31
3
=
31
3
+
16
3
b)
7
18
−
31
3
=
31
3
−
7
18
c)
7
18
÷
46
15
=
46
15
÷
7
18
d)
16
3
✕
46
15
=
46
15
✕
16
3
(i)
{b,c,a}
(ii)
{b,a}
(iii)
{b,d,a}
(iv)
{a,d}
(v)
{c,d}
Question
8
8.
Which of the following are true?
a)
13
2
✕
(
103
10
✕
9
2
)
=
(
13
2
✕
103
10
)
✕
9
2
b)
13
18
÷
(
103
10
÷
1
7
)
=
(
13
18
÷
103
10
)
÷
1
7
c)
13
2
+
(
20
3
+
19
7
)
=
(
13
2
+
20
3
)
+
19
7
d)
13
18
−
(
20
3
−
16
15
)
=
(
13
18
−
20
3
)
−
16
15
(i)
{b,a}
(ii)
{b,c,a}
(iii)
{d,c}
(iv)
{b,d,a}
(v)
{a,c}
Question
9
9.
Which of the following are true?
a)
5
16
✕
(
49
6
−
9
8
)
=
(
5
16
✕
49
6
)
−
(
5
16
✕
9
8
)
b)
19
12
−
(
49
6
✕
15
11
)
=
(
19
12
−
49
6
)
✕
(
19
12
−
15
11
)
c)
5
16
✕
(
67
12
+
19
14
)
=
(
5
16
✕
67
12
)
+
(
5
16
✕
19
14
)
d)
19
12
÷
(
67
12
+
4
5
)
=
(
19
12
÷
67
12
)
+
(
19
12
÷
4
5
)
(i)
{a,c}
(ii)
{b,d,a}
(iii)
{d,c}
(iv)
{b,c,a}
(v)
{b,a}
Question
10
10.
Which of the following are true?
a)
20
3
+
109
17
=
109
17
+
20
3
b)
20
3
✕
43
7
=
43
7
✕
20
3
c)
6
5
−
109
17
=
109
17
−
6
5
d)
6
5
÷
43
7
=
43
7
÷
6
5
(i)
{c,d,a}
(ii)
{a,b}
(iii)
{c,a}
(iv)
{c,b,a}
(v)
{d,b}
Question
11
11.
Which of the following are true?
a)
9
5
✕
(
66
17
✕
3
19
)
=
(
9
5
✕
66
17
)
✕
3
19
b)
9
5
+
(
54
5
+
7
4
)
=
(
9
5
+
54
5
)
+
7
4
c)
15
8
−
(
54
5
−
19
6
)
=
(
15
8
−
54
5
)
−
19
6
d)
15
8
÷
(
66
17
÷
3
16
)
=
(
15
8
÷
66
17
)
÷
3
16
(i)
{c,b,a}
(ii)
{c,a}
(iii)
{d,b}
(iv)
{c,d,a}
(v)
{a,b}
Question
12
12.
Which of the following are true?
a)
17
7
✕
(
13
11
+
5
2
)
=
(
17
7
✕
13
11
)
+
(
17
7
✕
5
2
)
b)
11
18
−
(
29
11
✕
10
17
)
=
(
11
18
−
29
11
)
✕
(
11
18
−
10
17
)
c)
11
18
÷
(
13
11
+
16
7
)
=
(
11
18
÷
13
11
)
+
(
11
18
÷
16
7
)
d)
17
7
✕
(
29
11
−
19
14
)
=
(
17
7
✕
29
11
)
−
(
17
7
✕
19
14
)
(i)
{b,d,a}
(ii)
{a,d}
(iii)
{c,d}
(iv)
{b,a}
(v)
{b,c,a}
Question
13
13.
Which of the following are true?
a)
19
11
−
35
19
=
35
19
−
19
11
b)
19
11
÷
101
11
=
101
11
÷
19
11
c)
11
6
✕
101
11
=
101
11
✕
11
6
d)
11
6
+
35
19
=
35
19
+
11
6
(i)
{a,c}
(ii)
{a,b,c}
(iii)
{a,d,c}
(iv)
{c,d}
(v)
{b,d}
Question
14
14.
Which of the following are true?
a)
17
11
+
(
58
7
+
17
9
)
=
(
17
11
+
58
7
)
+
17
9
b)
9
17
÷
(
137
14
÷
11
4
)
=
(
9
17
÷
137
14
)
÷
11
4
c)
17
11
✕
(
137
14
✕
4
19
)
=
(
17
11
✕
137
14
)
✕
4
19
d)
9
17
−
(
58
7
−
10
7
)
=
(
9
17
−
58
7
)
−
10
7
(i)
{a,c}
(ii)
{b,a}
(iii)
{b,d,a}
(iv)
{b,c,a}
(v)
{d,c}
Question
15
15.
Which of the following are true?
a)
8
5
−
(
21
4
✕
3
7
)
=
(
8
5
−
21
4
)
✕
(
8
5
−
3
7
)
b)
5
17
✕
(
21
4
−
4
5
)
=
(
5
17
✕
21
4
)
−
(
5
17
✕
4
5
)
c)
5
17
✕
(
39
10
+
9
2
)
=
(
5
17
✕
39
10
)
+
(
5
17
✕
9
2
)
d)
8
5
÷
(
39
10
+
3
20
)
=
(
8
5
÷
39
10
)
+
(
8
5
÷
3
20
)
(i)
{a,b}
(ii)
{b,c}
(iii)
{a,c,b}
(iv)
{d,c}
(v)
{a,d,b}
Assignment Key
1) (iv)
2) (iii)
3) (iv)
4) (iii)
5) (iii)
6) (iii)
7) (iv)
8) (v)
9) (i)
10) (ii)
11) (v)
12) (ii)
13) (iv)
14) (i)
15) (ii)
