5. Find:

   (i) 2.5 × 0.3      (ii) 0.1 × 51.7      (iii) 0.2 × 316.8      (iv) 1.3 × 3.1     (v) 0.5 × 0.05    (vi) 11.2 × 0.15    (vii) 1.07 × 0.02

   (viii) 10.05 × 1.05       (ix) 101.01 × 0.01     (x) 100.01 × 1.1

         

Answers (1)

As we know, The multiplication of the decimal number is just like multiplication of normal number, we just have to put decimal before a digit such that the number of digits after decimal should remain same.

In other words,

The Number of digits after the decimal should be the same before and after the multiplication.

So.

(i) 2.5 × 0.3   = 0.75

(ii) 0.1 × 51.7  = 5.17   

(iii) 0.2 × 316.8  =  63.36

(iv) 1.3 × 3.1   =   4.03

(v) 0.5 × 0.05  = 0.025

(vi) 11.2 × 0.15  = 1.680 

(vii) 1.07 × 0.02  = 0.0214

(viii) 10.05 × 1.05  = 10.5525     

(ix) 101.01 × 0.01  = 1.0101   

(x) 100.01 × 1.1  = 110.11 

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