In this page we have Important questions for rational Numbers Class 8 CBSE . Hope you like them and do not forget to like , social share and comment at the end of the page.
Question 1
Write the additive inverse of each of the following:
Answer
(i) 1
Additive inverse = -1
(ii) -1/9
Additive inverse = 1/9
(iii) -2/3
Additive inverse = 2/3
(iv) 2
Additive inverse =-2
(v) -9/=-9
Additive inverse =9
Question 2
What is the additive identity?
Answer 0
Question 3
True or False Statement
Answer
All the statement are true
Question 4
Find the multiplicative inverse of the following.
Answer
Multiplicative inverse =-12/11
Multiplicative inverse =-9/10
Multiplicative inverse =2
Multiplicative inverse =1
Multiplicative inverse =5
-1
Multiplicative inverse =-1/4
Question 5
Which of these properties hold false for Multiplication of rational numbers?
Answer
None of these
Question 6
Find the below multiplication
Answer
= -1 X 9/2 X 10 = -9/20
2. ( 25/-9) X ( 1/3)
= (-25/9) X (1/3)
=- 25 X 1/9 X 3= -25/27
3. (7/24)X 10
=7X10/24=70/24
Question 7
Find the following
Answer
Question 8
The product of two rational number is 2 , if one of the rational number is 1/7 ,what is the value of other?
Answer:
Let a be the other number, then
a X (1/7) =2
Or
a = 2 ÷ (1/7)
a=2X7=14
Question 11
Fill in the blanks
(i) ____ ÷ (-3)= (-4/15)
(ii) The numbers __________ and __________ are their own reciprocals
(iii) The reciprocal of 1 is __________.
(iv) (1/2) ÷ (2/3) =__________.
(v) The product of two rational numbers is always a __________.
(vi) The reciprocal of a negative rational number is __________.
Answer:
Question 12
Write five rational numbers which are smaller than 5
Answer:
0,1,2,3,4
Question 13
Find five rational numbers between (1) and 2
Answer:
We can write as
1 = 10/10
2= 20/10
So five rational numbers will be
11/10, 12/10, 13/10,14/10,15/10