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
6
is
(i)
(
-1
6
)
(ii)
6
-1
(iii)
0
(iv)
(
-1
1
6
)
(v)
6
1
Question
2
2.
The multiplicative inverse of
(
-1
3
)
is
(i)
-5
(ii)
-2
(iii)
-1
(iv)
-4
(v)
-3
1
Question
3
3.
The additive inverse of
(
-1
9
)
is
(i)
9
-1
(ii)
0
(iii)
9
1
(iv)
(
-8
9
)
(v)
1
9
Question
4
4.
The multiplicative inverse of
3
7
is
(i)
3
1
3
(ii)
7
3
(iii)
1
3
(iv)
4
1
3
(v)
1
1
3
Question
5
5.
The additive inverse of
9
2
is
(i)
(
-9
2
)
(ii)
2
9
(iii)
(
-5
1
2
)
(iv)
2
-9
(v)
0
Question
6
6.
The multiplicative inverse of
5
8
is
(i)
8
5
(ii)
3
5
(iii)
(
-2
5
)
(iv)
3
3
5
(v)
2
3
5
Question
7
7.
Which of the following are true?
a)
4
17
✕
154
19
=
154
19
✕
4
17
b)
4
17
+
92
13
=
92
13
+
4
17
c)
7
16
−
92
13
=
92
13
−
7
16
d)
7
16
÷
154
19
=
154
19
÷
7
16
(i)
{c,d,a}
(ii)
{d,b}
(iii)
{a,b}
(iv)
{c,b,a}
(v)
{c,a}
Question
8
8.
Which of the following are true?
a)
8
11
+
(
70
17
+
11
9
)
=
(
8
11
+
70
17
)
+
11
9
b)
8
11
✕
(
65
9
✕
11
6
)
=
(
8
11
✕
65
9
)
✕
11
6
c)
8
7
÷
(
65
9
÷
17
5
)
=
(
8
7
÷
65
9
)
÷
17
5
d)
8
7
−
(
70
17
−
11
7
)
=
(
8
7
−
70
17
)
−
11
7
(i)
{d,b}
(ii)
{c,b,a}
(iii)
{a,b}
(iv)
{c,a}
(v)
{c,d,a}
Question
9
9.
Which of the following are true?
a)
5
8
✕
(
24
5
−
13
7
)
=
(
5
8
✕
24
5
)
−
(
5
8
✕
13
7
)
b)
3
16
÷
(
145
16
+
1
19
)
=
(
3
16
÷
145
16
)
+
(
3
16
÷
1
19
)
c)
5
8
✕
(
145
16
+
16
15
)
=
(
5
8
✕
145
16
)
+
(
5
8
✕
16
15
)
d)
3
16
−
(
24
5
✕
14
17
)
=
(
3
16
−
24
5
)
✕
(
3
16
−
14
17
)
(i)
{b,a}
(ii)
{a,c}
(iii)
{b,d,a}
(iv)
{d,c}
(v)
{b,c,a}
Question
10
10.
Which of the following are true?
a)
5
18
÷
71
15
=
71
15
÷
5
18
b)
5
18
−
179
18
=
179
18
−
5
18
c)
7
15
✕
71
15
=
71
15
✕
7
15
d)
7
15
+
179
18
=
179
18
+
7
15
(i)
{a,d,c}
(ii)
{c,d}
(iii)
{a,c}
(iv)
{b,d}
(v)
{a,b,c}
Question
11
11.
Which of the following are true?
a)
3
4
✕
(
79
12
✕
4
9
)
=
(
3
4
✕
79
12
)
✕
4
9
b)
14
13
−
(
59
5
−
19
12
)
=
(
14
13
−
59
5
)
−
19
12
c)
3
4
+
(
59
5
+
17
20
)
=
(
3
4
+
59
5
)
+
17
20
d)
14
13
÷
(
79
12
÷
11
4
)
=
(
14
13
÷
79
12
)
÷
11
4
(i)
{d,c}
(ii)
{b,a}
(iii)
{b,c,a}
(iv)
{b,d,a}
(v)
{a,c}
Question
12
12.
Which of the following are true?
a)
12
17
✕
(
37
5
+
9
2
)
=
(
12
17
✕
37
5
)
+
(
12
17
✕
9
2
)
b)
19
14
−
(
28
17
✕
3
10
)
=
(
19
14
−
28
17
)
✕
(
19
14
−
3
10
)
c)
19
14
÷
(
37
5
+
13
7
)
=
(
19
14
÷
37
5
)
+
(
19
14
÷
13
7
)
d)
12
17
✕
(
28
17
−
14
11
)
=
(
12
17
✕
28
17
)
−
(
12
17
✕
14
11
)
(i)
{b,c,a}
(ii)
{b,a}
(iii)
{b,d,a}
(iv)
{c,d}
(v)
{a,d}
Question
13
13.
Which of the following are true?
a)
14
11
−
173
19
=
173
19
−
14
11
b)
9
8
✕
150
19
=
150
19
✕
9
8
c)
9
8
+
173
19
=
173
19
+
9
8
d)
14
11
÷
150
19
=
150
19
÷
14
11
(i)
{d,c}
(ii)
{a,d,b}
(iii)
{a,b}
(iv)
{a,c,b}
(v)
{b,c}
Question
14
14.
Which of the following are true?
a)
1
2
÷
(
61
10
÷
7
9
)
=
(
1
2
÷
61
10
)
÷
7
9
b)
1
2
−
(
129
16
−
15
16
)
=
(
1
2
−
129
16
)
−
15
16
c)
19
16
+
(
129
16
+
15
17
)
=
(
19
16
+
129
16
)
+
15
17
d)
19
16
✕
(
61
10
✕
16
15
)
=
(
19
16
✕
61
10
)
✕
16
15
(i)
{a,c}
(ii)
{a,b,c}
(iii)
{c,d}
(iv)
{b,d}
(v)
{a,d,c}
Question
15
15.
Which of the following are true?
a)
9
16
✕
(
145
16
−
5
12
)
=
(
9
16
✕
145
16
)
−
(
9
16
✕
5
12
)
b)
9
16
✕
(
86
9
+
9
20
)
=
(
9
16
✕
86
9
)
+
(
9
16
✕
9
20
)
c)
16
17
−
(
145
16
✕
8
9
)
=
(
16
17
−
145
16
)
✕
(
16
17
−
8
9
)
d)
16
17
÷
(
86
9
+
7
12
)
=
(
16
17
÷
86
9
)
+
(
16
17
÷
7
12
)
(i)
{c,d,a}
(ii)
{c,b,a}
(iii)
{a,b}
(iv)
{c,a}
(v)
{d,b}
Assignment Key
1) (i)
2) (v)
3) (v)
4) (ii)
5) (i)
6) (i)
7) (iii)
8) (iii)
9) (ii)
10) (ii)
11) (v)
12) (v)
13) (v)
14) (iii)
15) (iii)
