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CBSE Class 8 Maths Worksheet

Rational Number

1.

_____ is additive identity of rational numbers

A)

1

 B)

0
2.

Which of the following properties is shown by the below expression:

[(1/5)+(3/5)]+(1/7) =(1/5)+[(3/5)+(1/7)]

A)

Commutative

 B)

Associative

 C)

Distributive

 D)

Closure
3.

A number which is not a rational is called 

A)

Natural number

 B)

Whole number

 C)

Irrational numbers

 D)

None of these
4.
Find: 4/10*-6/14-2/28-6/14*6/10.
5.
State Yes/No: Is division commutative for rational numbers ?
A) YES B) NO
6.

The rational number which is not lying between (5/14) and (1/2) is

A)

7/16

 B)

3/8

 C)

13/32

 D)

1/4
7.

 is the multiplicatie inverse of 

A) True B) False
8.

If x≠0 then the value of  is

A)

a rational number

 B)

not a rational number

 C)

not equal to zero

 D)

None of these
9.
State True/False: A number which can be written in the form p/q , where p and q are integers and q is not equal to 0 is called a rational number.
A) true B) false
10.
Fill in the blanks: Between any two distinct rational numbers , there are ____ many rational numbers .
11.

 is called _______ property.

A)

additive identity

 B)

multiplicative identity

 C)

multiplicative inverse

 D)

additive inverse
12.
a/b is a rational number, b is usually positive, whereas a may be positive, negative or zero.
A) true B) false
13.
State True/False: A rational number c/d is called the multiplicative inverse of another rational number a/b if a/b*c/d=1.
A) true B) false
14.

Simplify: (4/9)+(5/3)+(-7/2)+(2/9)+(-1/3)+(9/2)

A)

2

 B)

1

 C)

3

 D)

0
15.

The number added to -2 to get   is

A)

5

 B)

-11

 C)

D)

0
16.

The numbers between two rational numbers are

A)

Finite

 B)

Infinite

 C)

10

 D)

All the three
17.

  is the additive inverse of _______

A)

B)

18.

Q1. Add the following:

7 / -13 and 4 / -13

A)

-10/13

 B)

-11/13

 C)

1

 D)

0
19.

-7 is a negative integer as well as a rational number.

A) True B) False
20.
Fill in the blanks: When you use distributivity, you split a product as a sum or difference of ____ products.

CBSE Class 8 Maths Worksheet

Rational Number

Answers

1.
Option B
2.
Option B
3.
Option C

4.
(-1/2)

Solution: => 4/10*-6/14-2/28-6/14*6/10
=> 4/10*-6/14+(-6/14)*6/10-2/28
=> -6/14 (4/10+6/10)-2/28
=> -6/14*1-2/28
=> -13-1/28 = -1/2

5.
Option B
6.
Option C
7.
Option A
8.
Option A
9.
Option A

10.
Infinitely
11.
Option B
12.
Option A
13.
Option A
14.
Option C
15.
Option C
16.
Option B
17.
Option A
18.
Option B
19.
Option A

20.
Two
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