NCERT Solutions
Class 7 Maths
Fractions and Decimals
Electric charges

Ex.2.1 Q.1

Solve:

1. 2 –  

2. 4 +          

3. +  

           

 +  +

6. 2  + 3

7. 8  - 3

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Ex.2.1 Q.2

Arrange the following in descending order:

1.                       

2. 

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Ex.2.1 Q.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?

              7-Maths-NCERT-Solutions-Chapter-2-1-002.jpg

(Along the first row;   +  =  )

 

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Ex.2.1 Q.4

A rectangular sheet of paper is 12  cm long and 10  cm wide. Find its perimeter.

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Ex.2.1 Q.5

Find the perimeter of 1. Δ ABE, 2. the rectangle BCDE in this figure. Whose perimeter is greater?

7-Maths-NCERT-Solutions-Chapter-2-1-004.jpg

 

 

 

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Ex.2.1 Q.6

Salil wants to put a picture in a frame. The picture is 7  cm wide.

To fit in the frame the picture cannot be more than 7  cm wide.

How much should the picture be trimmed?

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Ex.2.1 Q.7

Ritu ate   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?

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Ex.2.1 Q.8

Michael finished colouring a picture in   hour. Vaibhav finished colouring the same picture in   hour.

Who worked longer? By what fraction was it longer?

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Ex.2.2 Q.1

Which of the drawings (a) to (d) show

1. 2 ×   

 

2. 2 × 

 

3. 3 ×    

 

4. 3 ×    

1.jpg

 

11.jpg

 

 

12.jpg

 

 

13.jpg

 

 

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Ex.2.2 Q.2

Some pictures (a) to (c) are given below. Tell which of them show:

1. 3 ×   =   

2. 2 ×   =    

3. 3 ×   = 2  

2.jpg                                                                                           

 

21.jpg

 

 

 

 

22.jpg

 

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Ex.2.2 Q.3

Multiply and reduce to lowest form and convert into a mixed fraction:

1. 7 ×               

2.  4 ×           

3. 2 ×            

4. 5 ×          

5.   ×

6.    × 6         

7. 11 ×        

8.  20 ×        

9. 13 ×          

10. 15 × 

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Ex.2.2 Q.4

Shade:

1.   of the circles in box

 

2.    of the triangles in box

 

3.   of the squares in box

3.jpg

 

 

31.jpg

 

 

 

32.jpg

 

 

 

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Ex.2.2 Q.5

Find:

(a)   of 1. 24 2. 46                    

(b)   of 1. 18 2. 27

(c)   of 1. 16 2. 36                      

(d)   of 1. 20 2. 35

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Ex.2.2 Q.6

Multiply and express as a mixed fraction:

(a) 3 × 5  

(b) 5 × 6  

(c) 7 × 2  

(d) 4 × 6  

(e) 3  × 6

(f) 3  × 8

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Ex.2.2 Q.7

Find:

(a) 1/2 of 1. 2   2. 4  

(b) 5/8 of 1. 3   2. 9

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Ex.2.2 Q.8

Vidya and Pratap went for a picnic. Their mother gave them a water bottle that contained 5 litres of water.

Vidya consumed   of the water. Pratap consumed the remaining water.

(i) How much water did Vidya drink?

(ii) What fraction of the total quantity of water did Pratap drink?

 

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Ex.2.3 Q.1

Find:

1.    of (a) 1/4 (b) 3/5 (c) 4/3

2.   of (a) 2/9 (b) 6/5 (c) 3/10

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Ex.2.3 Q.2

Multiply and reduce to lowest form (if possible):

1.   × 2    

2.   × 7/9   

3.   ×         

4.   ×          

5.   ×      

 6.   ×       

 7.   × 

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Ex.2.3 Q.3

Multiply the following fractions:

1.   × 5     

2. 6   ×         

3.   × 5       

4.   × 2         

5. 3   ×      

6.  2   × 3     

7. 3   ×  

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Ex.2.3 Q.4

Which is greater:

1.  of   or   of                 

2.   of   or   of 

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Ex.2.3 Q.5

Saili plants 4 saplings in a row in her garden.

The distance between two adjacent saplings is  m.

Find the distance between the first and the last sapling.

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Ex.2.3 Q.6

Lipika reads a book for 1  hour every day.

She reads the entire book in 6 days. How many hours in all were required by her to read the book?

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Ex.2.3 Q.7

A car runs 16 km using 1 litre of petrol.

How much distance will it cover using 2  litres of petrol?

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Ex.2.3 Q.8

(a) 1. Provide the number in the box ___ such that   × ___      =

 

     2. The simplest form of the number obtained in  ___     is __________.

 

(b) 1. Provide the number in the box       such that   ×____

     2. The simplest form of the number obtained in  ____     is __________.

 

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Ex.2.4. Q.1

Find:

1. 12 ÷        

2. 14 ÷        

3. 8 ÷        

4.  4 ÷        

5.  3 ÷ 2         

6. 5 ÷ 3

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Ex.2.4 Q.2

Find the reciprocal of each of the following fractions.

Classify the reciprocals as proper fraction, improper fractions and whole numbers.

1.          

2.            

3.            

4.          

5.          

6.           

7. 1

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Ex.2.4 Q.3

Find:

1.   ÷ 2      

2.   ÷ 5      

3.  ÷ 7     

4.  4  ÷ 3      

5. 3   ÷ 4       

6.4  ÷ 7

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Ex.2.4 Q.4

Find:

1.   ÷                 

2.   ÷              

3.   ÷                    

4. 2  ÷   

5. 3   ÷             

6.   ÷ 1            

7. 3   ÷ 1             

8. 2   ÷ 1

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Ex.2.5 Q.1

Which is greater:

1. 0.5 or 0.05          

2. 0.7 or 0.07          

3. 7 or 0.7        

4. 1.37 or 1.49

5. 2.03 or 2.30         

6. 0.8 or 0.88

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Ex.2.5 Q.2

Express as rupees using decimals:

1. 7 paise                     

2. 7 rupees 7 paise               

3. 77 rupees 77 paise

4. 50 paise                    

5. 235 paise

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Ex.2.5 Q.3

1. Express 5 cm in meter and kilometre.

2. Express 35 mm in cm, m and km.

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Ex.2.5 Q.3

Express in kg.:

1. 200 g                    

2. 3470 g                     

3. 4 kg 8 g

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Ex.2.5 Q.5

Write the following decimal numbers in the expanded form:

1. 20.03              

2. 2.03                 

3. 200.03              

4. 2.034

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Ex.2.5 Q.6

Write the place value of 2 in the following decimal numbers:

1. 2.56           

2. 21.37           

3. 10.25            

4. 9.42           

5. 63.352

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Ex.2.5 Q.7

Dinesh went from place A to place B and from there to place C. A is 7.5 km from B and B is 12.7 km from C.

Ayub went from place A to place D and from there to place C. D is 9.3 km from A and C is 11.8 km from D.

Who travelled more and by how much?

 1.jpg       

                                                

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Ex.2.5 Q.8

Shyam bought 5 kg 300 g apples and 3 kg 250 g mangoes.

Sarala bought 4 kg 800 g oranges and 4 kg 150 g bananas.

Who bought more fruits?

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Ex.2.5 Q.9

How much less is 28 km than 42.6 km?

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Ex.2.6 Q.1

Find:

1. 0.2 × 6      

2. 8 × 4.6      

3. 2.71 × 5        

4. 20.1 × 4      

5. 0.05 × 7       

6. 211.02 × 4    

7. 2 × 0.86

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Ex.2.6 Q.2

Find the area of rectangle whose length is 5.7 cm and breadth are 3 cm.

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Ex.2.6 Q.3

Find:

1. 1.3 × 10             

2. 36.8 × 10         

3. 153.7 × 10            

4. 168.07 × 10       

5. 31.1 × 100         

6. 156.1 × 100      

7. 3.62 × 100     

8. 43.07 × 100         

9. 0.5 × 10            

10. 0.08 × 10       

11.  0.9 × 100      

12. 0.03 × 1000

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Ex.2.6 Q.4

A two-wheeler covers a distance of 55.3 km in one litre of petrol.

How much distance will it cover in 10 litres of petrol?

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Ex.2.6 Q.5

Find:

1. 2.5 × 0.3       

2.  0.1 × 51.7    

3. 0.2 × 316.8   

4. 1.3 × 3.1    

5. 0.5 × 0.05     

6. 11.2 × 0.15  

7. 1.07 × 0.02   

8. 10.05 × 1.05   

9.  101.01 × 0.01     

10. 100.01 × 1.1

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Ex.2.7 Q.1

Find:

1. 0.4 ÷ 2       

2. 0.35 ÷ 5        

3. 2.48 ÷ 4     

4. 65.4 ÷ 6       

5. 651.2 ÷ 4    

6. 14.49 ÷ 7    

7. 3.96 ÷ 4        

8. 0.80 ÷ 5

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Ex.2.7 Q.2

Find:

1. 4.8 ÷ 10           

2. 52.5 ÷ 10        

3. 0.7 ÷ 10       

4. 33.1 ÷ 10        

5. 272.23 ÷ 10

6. 0.56 ÷ 10       

7. 3.97 ÷ 10

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Ex.2.7 Q.3

1. 2.7 ÷ 100       

2. 0.3 ÷ 100            

3. 0.78 ÷ 100         

4. 432.6 ÷ 100        

5. 23.6 ÷ 100

6. 98.53 ÷ 100

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Ex.2.7 Q.4

Find:

1. 7.9 ÷ 1000         

2. 26.3 ÷ 1000          

3. 38.53 ÷ 1000           

4. 128.9 ÷ 1000

5. 0.5 ÷ 1000

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Ex.2.7 Q.5

Find:

1. 7 ÷ 3.5

2. 36 ÷ 0.2

3. 3.25 ÷ 0.5

4. 30.94 ÷ 0.7

5. 0.5 ÷ 0.25

6. 7.75 ÷ 0.25

7. 76.5 ÷ 0.15

8. 37.8 ÷ 1.4

9. 2.73 ÷ 1.3

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Ex.2.7 Q.6

A vehicle covers a distance of 43.2 km in 2.4 litres of petrol.

How much distance will it cover in one litre petrol?

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Complete NCERT Solutions: Classes 6 to 12, All Chapters

NCERT Solution for class 6
NCERT Solution for class 7
NCERT Solution for class 8
NCERT Solution for class 9
NCERT Solution for class 10
NCERT Solution for class 11
NCERT Solution for class 12

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