Class 7 – Mathematics – Exercise 2.1 – Fractions and decimals – NCERT Exercise Solution

1. Solve:

(i) 2 – (3/5)

(ii) 4 + (7/8)

(iii) (3/5) + (2/7)

(iv) (9/11) – (4/15)

(v) (7/10) + (2/5) + (3/2)

(vi)  2 ²/₃ + 3 ¹/₂

(vii) 8 ¹/₂  – 3 ⁵/₈

2. Arrange the following in descending order:

3. In a “magic square” the sum of number in each row, in each column and along the diagonals is the same. Is this a magic square?

4. A rectangular sheet of paper is 12¹/₂ cm long and 10²/₃cm wide. Find its perimeter.

5. Find the perimeter of (i) ∆ABE (ii) the rectangle BCDE in this figure. Whose perimeter is greater?

(attach fig from NCERT Book)

6. Salil wants to put a picture in a frame. The picture is 7²/₅ cm wide. To fit in the frame, the picture cannot be more than 7³/₁₀ cm wide. How much should the picture be trimmed?

7. Ritu ate (3/5) part of an apple and the remaining apple was eaten by her brother Somu. How much part of the apple did Somu eat? Who had the larger share? By how much?

8. Michael finished colouring a picture in  (7/12) hour. Vaibhav finished colouring the same picture in(3/4) hour. Who worked longer? By what fraction was it longer?