Question

Represent the following in form of decimal fractions :

(i) 3/10

(ii) 4 + (8/10)

(iii) 300 + 50 + 8 + (1/10)

(iv) 90 + (3/10)

(v) 3/2

(vi) 2/5

(vii) 4(1/2)

(viii) 3(3/5)

Answer 1

On representing each in form of decimal fractions : 

(i) 3/10 = 0.3 

(ii) 4 + (8/10) = 4 + 0.8 = 4.8 

(iii) 300 + 50 + 8 + (1/10) = 358 + 0.1 = 358.1 

(iv) 90 + (3/10) = 90 + 0.3 = 90.3

(v) 3/2 for making its denominator 10, multiply its numerator and denominator by 5 : 

(3/2) × (5/5) = 15/10 = 1.5 

(vi) 2/5 for making its denominator 10, multiply its numerator and denominator by 2 : 

(2/5) × (2/2) = (4/10) = 0.4 

(vii) 4(1/2) = 9/2 for making its denominator 10, multiply its numerator and denominator by 5 : 

(9/2) × (5/5) = 45/10 = 4.5 

(viii) 3(3/5) = 18/5 for making its denominator 10, multiply its numerator and denominator by 2 : 

(18/5) × (2/2) = 36/10 = 3.6