NCERT Solutions Class 7 Maths Chapter 9 Rational Numbers Exercise 9.2

Rational Numbers

Exercise 9.2

1). Find the sum of:

i). 5/4 + (-11/4)                                          ii). 5/3 + 3/5

iii). -9/10 + 22/15                                       iv). -3/11 + 5/9

v). -8/19 + (-2)/57                                        vi). -2/3 + 0

vii). -2 1/3 + 4 3/5

Answer: 

i). 5/4 + (-11/4)                                         

ii). 5/3 + 3/5

iii). -9/10 + 22/15      

                                

 

iv). -3/11 + 5/9

v). -8/19 + (-2)/57                                       

vi). -2/3 + 0

-2/3 + 0 = -2/3 

 

vii). -2 1/3 + 4 3/5

 

2). Find:

i). 7/2417/36                                          ii). 5/63 – (-6/21)

iii). -6/13 – (-7/15)                                      iv). -3/87/11

v). -2 1/9 – 6

Answer: 

i). 7/2417/36                                         

ii). 5/63 – (-6/21)

iii). -6/13 – (-7/15)                                     

iv). -3/87/11

v). -2 1/9 – 6

 

3). Find the product of:

i). 9/2 X (-7/4)                                         ii). 3/10 X (-9)

iii). -6/5 X 9/11                                       iv). 3/7 X (-2/5)

v). 3/11 X 2/5                                         vi). 3/-5 X -5 X 3

Answer:

i). 9/2 X (-7/4)                                         ii). 3/10 X (-9)

 

iii). -6/5 X 9/11                                       iv). 3/7 X (-2/5)

 

v). 3/11 X 2/5                                         vi). 3/-5 X -5 X 3

                                      

Click here for the solutions of

Exercise 9.1

Exercise 9.2

Exercise 8.1

Exercise 8.2

Exercise 8.3

Exercise 7.1

Exercise 7.2

Exercise 6.1

Exercise 6.2

Exercise 6.3

Exercise 6.4

Exercise 6.5

Exercise 5.1

Exercise 5.2

Exercise 4.1

Exercise 4.2

Exercise 4.3

Exercise 4.4

Exercise 3.1

Exercise 3.2

Exercise 3.3

Exercise 3.4

 

 

 

4). Find the value of:

i). -4 ÷ 2/3                                               ii). -3/5 ÷ 2

iii). -4/5 ÷ (-3)                                           iv). -1/8 ÷ ¾

v). -2/13 ÷ 1/7                                           vi). -7/12 ÷ (-2/13)

vii). 3/13 ÷ (-4/65)

Answer:

i). -4 ÷ 2/3                                               ii). -3/5 ÷ 2

 

iii). -4/5 ÷ (-3)                                           iv). -1/8 ÷ ¾

v). -2/13 ÷ 1/7                                           vi). -7/12 ÷ (-2/13)

vii). 3/13 ÷ (-4/65)

 

 

 

 

 

 

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