CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade VIII - Rational Numbers
Question 1
1.
    • 4
      1
      11
    • −
    • 4
    • = ______
  • 3
    11
  • 1
    11
  • 1
    9
  • (
    -1
    11
    		 )
  • 1
    13
Question 2
2.
Find the difference between the values of numbers at point A and B
  • 1
    6
  • (
    -1
    8
    		 )
  • (
    -1
    2
    		 )
  • (
    -1
    6
    		 )
  • (
    -1
    4
    		 )
Question 3
3.
    • 3
      5
    • +
    • 5
    • = ______
  • 28
    5
  • 28
    3
  • 6
  • 26
    5
  • 4
Question 4
4.
Which of the following are true?
a)
16
÷
4
=
4
÷
16
b)
12
+
7
=
7
+
12
c)
7
−
16
=
16
−
7
d)
4
✕
12
=
12
✕
4
  • {c,d}
  • {a,d,b}
  • {b,d}
  • {a,c,b}
  • {a,b}
Question 5
5.
Which of the following are true?
a)
real numbers are closed under addition
b)
real numbers are closed under division
c)
real numbers are closed under subtraction
d)
real numbers are closed under multiplication
  • {a,c,d}
  • {b,a}
  • {b,a,c}
  • {b,d}
  • {b,c}
Question 6
6.
    • Which of the following is true?
a)
2.1300
−
(
 15.3600
−
 18.0500
)
=
(
 2.1300
−
 15.3600
)
−
 18.0500
b)
18.0500
✕
(
 12.9400
✕
 2.1300
)
=
(
 18.0500
✕
 12.9400
)
✕
 2.1300
c)
12.9400
+
(
 2.1300
+
 15.3600
)
=
(
 12.9400
+
 2.1300
)
+
 15.3600
d)
15.3600
÷
(
 18.0500
÷
 12.9400
)
=
(
 15.3600
÷
 18.0500
)
÷
 12.9400
  • {b,c}
  • {a,d,b}
  • {d,c}
  • {a,c,b}
  • {a,b}
Question 7
7.
Find the difference of the rational numbers at the points labelled with letters I and J
  • 1
    5
  • (
    -3
    5
    		 )
  • (
    -1
    7
    		 )
  • (
    -1
    3
    		 )
  • (
    -1
    5
    		 )
Question 8
8.
Find the sum of the rational numbers at the points labelled with letters P and Q
  • -15
  • -10
  • -13
  • -14
  • -12
Question 9
9.
Which of the following are true?
a)
18
13
−
73
15
=
73
15
−
18
13
b)
18
13
÷
76
17
=
76
17
÷
18
13
c)
9
5
+
73
15
=
73
15
+
9
5
d)
9
5
✕
76
17
=
76
17
✕
9
5
  • {a,c}
  • {a,d,c}
  • {b,d}
  • {c,d}
  • {a,b,c}
Question 10
10.
    • Which of the following decimal numbers lie between
    • 3751
    • and
    • 3752
    • ?
  • 375.1
  • 3750.1
  • 3753
  • 37513.3
  • 3751.3