Fractions and Decimals - Solutions
CBSE Class –VII Mathematics
NCERT Solutions
Chapter 2 Fractions and Decimals (Ex. 2.1)
Question 1. Solve:
(i)2- (ii) 4 + (iii) (iv)
(v) (vi)i
(vii)
Answer: (i) = =
(ii) = =
(iii) = =
(iv) =
(v) = = =
(vi) = = = =
(vii) = = = =
Question 2. Arrange the following in descending order:
(i)
(ii)
Answer: (i) [Converting into like fractions]
[Arranging in descending order]
Therefore,
(ii) [Converting into like fractions]
[Arranging in descending order]
Therefore,
Question 3. In a “magic square”, the sum of the numbers in each row, in each column and along the diagonals is the same. Is this a magic square?
Answer: Sum of first row = [Given]
Sum of second row =
Sum of third row =
Sum of first column =
Sum of second column =
Sum of third column =
Sum of first diagonal (left to right) =
Sum of second diagonal (left to right) =
Since, the sum of fractions in each row, in each column and along the diagonals are same, therefore, it s a magic square.
Question 4. A rectangular sheet of paper is cm long and cm wide. Find its perimeter.
Answer: Given: The sheet of paper is in rectangular form.
Length of sheet = cm and Breadth of sheet = cm
Perimeter of rectangle = 2 (length + breadth)
= =
= =
=