Important Questions of Rational Numbers Question and Answers Paper (For CBSE, ICSE, IAS, NET, NRA 2022)
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Question 1
Write the additive inverse of each of the following:
i) 1
ii)
iii)
iv)
v)
Answer
(i) 1
Additive inverse =-1
(ii)
Additive inverse
(iii)
Additive inverse
(iv) 2
Additive inverse = 2
(v)
Additive inverse = 9
Question 2
What is the additive identity?
a. 1
b. -1
c. 0
d. None of the above
Answer: 0
Question 3
True of False Statement
i) The difference of two rational number is a rational number
ii) Addition of rational numbers is associative
iii) Addition of rational numbers is commutative
iv) Subtraction of rational numbers is not commutative
v) The addition or subtraction of two rational number is a rational number
Answer:
All the statement are true
Question 4
Find the Multiplicative inverse of the following.
(i)
(ii)
(iii)
(iv)
(v)
(vi) 4
Answer
(i)
Multiplicative inverse
(ii)
Multiplicative inverse
(iii)
Multiplicative inverse = 2
(iv)
Multiplicative inverse = 1
(v)
Multiplicative inverse = 5
(VI) -1
Multiplicative inverse
Question 5
Which of these properties hold false for Multiplication of rational numbers?
1. Associative law
2. Closure law
3. Commutative law
4. Existence of Multiplicative identity
5. None of the these
Answer: None of these
Question 6
Find the below Multiplication
i)
ii)
iii)
Answer
i)
iii)
Question 7
Find the following
i)
ii)
iii)
iv)
Answer
i) Multiplicative inverse of
ii) Multiplicative inverse of
iii) Multiplicative inverse of
iv) Multiplicative inverse of
Question 8
The product of two rational number is 2, if one of the rational number is , what is the value of other?
Answer
Let a be the other number then
Or
Question 9
Fill in the blank
(i) …
(ii) The numbers … and … are their own reciprocals
(iii) The reciprocal of 1 is …
(iv) …
(v) The product of two rational numbers is always a …
(vi) The reciprocal of a negative rational number is …
Answer
i)
ii) 1 and -1
iii) 1
iv) 3
v) Rational Number
vi) Negative Rational Number
Question 10
Write five rational numbers which are smaller than 5
Answer: 0, 1,2, 3,4
Question 11
Find five rational numbers between (1) and 2
Answer:
We can write s
So five rational numbers will be