NCERT Class 7 Mathematics

FRACTIONS AND DECIMALS 31

Thus, time devoted by her for other subjects =
17 14
35

 

h

=

17 5 14 3–h

15 15



    =

85 – 42 h

15



   

=

43

15 h =

213

15 h

EXERCISE 2.1

1. Solve:

(i)

2 3

5

(^) (ii) 4 7
8
 (iii)^32
57
 (iv)^94
11 15
(v)
723
10 5 2
 (vi) 2321
32
 (vii) 8315
28

2. Arrange the following in descending order:

(i)

2

9

2

3

8

21

,, (ii)^1

5

3

7

7

10

,,.

3. In a “magic square”, the sum of the numbers in each row, in each column and along
   the diagonal is the same. Is this a magic square?
   4
   11
   3
   11
   8
   11

9

11

5

11

1

11

2

11

7

11

6

11

4. A rectangular sheet of paper is
   121
   2 cm long and

102

3 cm wide.

Find its perimeter.

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


6. Salil wants to put a picture in a frame. The picture is^7
   3
   5
   cm wide.

To fit in the frame the picture cannot be more than^7

3

10

cm wide. How much should

the picture be trimmed?.

(Along the first row^49215

11 11 11 11

).

(^5) cm
2 3
2cm
4
3cm^3
5
(^7) cm
6