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NCERT solution class 7 chapter 9 Rational numbers exercise 9.2 mathematics

EXERCISE 9.2


Page No 190:

Question 1:

Find the sum:

(i)  (ii)  (iii) 

(iv)  (v)  (vi) 

(vii) 

Answer:

(i)

45+-11  4 = 45-11  4 = 16-5520 = -39   20(ii) 

L.C.M of 3 and 5 is 15.

(iii) 

L.C.M of 10 and 15 is 30.

(iv)  

L.C.M of 11 and 9 is 99.

(v) 

L.C.M of 19 and 57 is 57.

(vi) 

(vii)  = 

L.C.M of 3 and 5 is 15.

Question 2:

Find

(i)  (ii)  (iii) 

(iv)  (v) 

Answer:

(i) 

L.C.M of 24 and 36 is 72.

(ii) 

L.C.M of 63 and 7 is 63.

(iii) 

L.C.M of 13 and 15 is 195.

(iv) 

L.C.M of 8 and 11 is 88.

(v) 

L.C.M of 9 and 1 is 9.

Question 3:

Find the product:

(i)  (ii)  (iii) 

(iv)  (v)  (vi) 

Answer:

(i) 

(ii) 

(iii) 

(iv) 

(v) 

(vi) 

Question 4:

Find the value of:

(i)  (ii)  (iii) 

(iv)  (v)  (vi) 

(vii) 

Answer:

(i) 

(ii) 

(iii) 

(iv) 

(v) 

(vi) 

(vii) 

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