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
5
2
is
(i)
2
-5
(ii)
(
-5
2
)
(iii)
2
5
(iv)
0
(v)
(
-3
1
2
)
Question
2
2.
The multiplicative inverse of
(
-5
2
)
is
(i)
(
-1
2
5
)
(ii)
(
-2
2
5
)
(iii)
1
3
5
(iv)
(
-2
5
)
(v)
3
5
Question
3
3.
The additive inverse of
(
-5
4
)
is
(i)
4
5
(ii)
1
4
(iii)
5
4
(iv)
4
-5
(v)
0
Question
4
4.
The multiplicative inverse of
(
-9
2
)
is
(i)
7
9
(ii)
(
-2
9
)
(iii)
1
7
9
(iv)
(
-2
2
9
)
(v)
(
-1
2
9
)
Question
5
5.
The additive inverse of
2
5
is
(i)
5
2
(ii)
0
(iii)
(
-1
2
5
)
(iv)
5
-2
(v)
(
-2
5
)
Question
6
6.
The multiplicative inverse of
(
-7
9
)
is
(i)
(
-9
7
)
(ii)
5
7
(iii)
(
-3
2
7
)
(iv)
(
-2
7
)
(v)
(
-2
2
7
)
Question
7
7.
Which of the following are true?
a)
4
9
✕
41
5
=
41
5
✕
4
9
b)
10
3
−
115
12
=
115
12
−
10
3
c)
4
9
+
115
12
=
115
12
+
4
9
d)
10
3
÷
41
5
=
41
5
÷
10
3
(i)
{b,c,a}
(ii)
{d,c}
(iii)
{b,d,a}
(iv)
{a,c}
(v)
{b,a}
Question
8
8.
Which of the following are true?
a)
4
7
✕
(
53
9
✕
1
8
)
=
(
4
7
✕
53
9
)
✕
1
8
b)
4
7
+
(
107
13
+
11
16
)
=
(
4
7
+
107
13
)
+
11
16
c)
2
9
÷
(
53
9
÷
11
10
)
=
(
2
9
÷
53
9
)
÷
11
10
d)
2
9
−
(
107
13
−
4
19
)
=
(
2
9
−
107
13
)
−
4
19
(i)
{c,d,a}
(ii)
{a,b}
(iii)
{c,b,a}
(iv)
{c,a}
(v)
{d,b}
Question
9
9.
Which of the following are true?
a)
20
3
−
(
16
3
✕
15
16
)
=
(
20
3
−
16
3
)
✕
(
20
3
−
15
16
)
b)
20
3
÷
(
155
19
+
14
17
)
=
(
20
3
÷
155
19
)
+
(
20
3
÷
14
17
)
c)
7
13
✕
(
155
19
+
6
19
)
=
(
7
13
✕
155
19
)
+
(
7
13
✕
6
19
)
d)
7
13
✕
(
16
3
−
19
18
)
=
(
7
13
✕
16
3
)
−
(
7
13
✕
19
18
)
(i)
{a,b,c}
(ii)
{b,d}
(iii)
{a,d,c}
(iv)
{a,c}
(v)
{c,d}
Question
10
10.
Which of the following are true?
a)
8
5
÷
17
12
=
17
12
÷
8
5
b)
8
13
+
71
10
=
71
10
+
8
13
c)
8
5
−
71
10
=
71
10
−
8
5
d)
8
13
✕
17
12
=
17
12
✕
8
13
(i)
{b,d}
(ii)
{a,b}
(iii)
{c,d}
(iv)
{a,d,b}
(v)
{a,c,b}
Question
11
11.
Which of the following are true?
a)
17
13
÷
(
77
10
÷
1
19
)
=
(
17
13
÷
77
10
)
÷
1
19
b)
17
13
−
(
25
14
−
11
7
)
=
(
17
13
−
25
14
)
−
11
7
c)
2
9
+
(
25
14
+
15
16
)
=
(
2
9
+
25
14
)
+
15
16
d)
2
9
✕
(
77
10
✕
13
18
)
=
(
2
9
✕
77
10
)
✕
13
18
(i)
{a,d,c}
(ii)
{c,d}
(iii)
{b,d}
(iv)
{a,b,c}
(v)
{a,c}
Question
12
12.
Which of the following are true?
a)
19
8
✕
(
34
11
+
3
2
)
=
(
19
8
✕
34
11
)
+
(
19
8
✕
3
2
)
b)
1
2
÷
(
34
11
+
6
7
)
=
(
1
2
÷
34
11
)
+
(
1
2
÷
6
7
)
c)
19
8
✕
(
46
9
−
5
3
)
=
(
19
8
✕
46
9
)
−
(
19
8
✕
5
3
)
d)
1
2
−
(
46
9
✕
17
16
)
=
(
1
2
−
46
9
)
✕
(
1
2
−
17
16
)
(i)
{d,c}
(ii)
{b,c,a}
(iii)
{b,a}
(iv)
{a,c}
(v)
{b,d,a}
Question
13
13.
Which of the following are true?
a)
7
2
÷
15
7
=
15
7
÷
7
2
b)
7
2
−
79
15
=
79
15
−
7
2
c)
13
4
+
79
15
=
79
15
+
13
4
d)
13
4
✕
15
7
=
15
7
✕
13
4
(i)
{a,c}
(ii)
{b,d}
(iii)
{a,d,c}
(iv)
{a,b,c}
(v)
{c,d}
Question
14
14.
Which of the following are true?
a)
13
15
÷
(
26
3
÷
13
8
)
=
(
13
15
÷
26
3
)
÷
13
8
b)
14
9
+
(
29
3
+
1
20
)
=
(
14
9
+
29
3
)
+
1
20
c)
14
9
✕
(
26
3
✕
5
18
)
=
(
14
9
✕
26
3
)
✕
5
18
d)
13
15
−
(
29
3
−
10
17
)
=
(
13
15
−
29
3
)
−
10
17
(i)
{a,b}
(ii)
{a,d,b}
(iii)
{d,c}
(iv)
{b,c}
(v)
{a,c,b}
Question
15
15.
Which of the following are true?
a)
2
11
−
(
36
7
✕
11
8
)
=
(
2
11
−
36
7
)
✕
(
2
11
−
11
8
)
b)
20
19
✕
(
92
11
+
12
17
)
=
(
20
19
✕
92
11
)
+
(
20
19
✕
12
17
)
c)
2
11
÷
(
92
11
+
7
11
)
=
(
2
11
÷
92
11
)
+
(
2
11
÷
7
11
)
d)
20
19
✕
(
36
7
−
14
11
)
=
(
20
19
✕
36
7
)
−
(
20
19
✕
14
11
)
(i)
{a,c,b}
(ii)
{a,b}
(iii)
{b,d}
(iv)
{a,d,b}
(v)
{c,d}
Assignment Key
1) (ii)
2) (iv)
3) (iii)
4) (ii)
5) (v)
6) (i)
7) (iv)
8) (ii)
9) (v)
10) (i)
11) (ii)
12) (iv)
13) (v)
14) (iv)
15) (iii)
