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Q

Find 0.4 divided by 2

1.   Find:

             (i)\; 0.4\div 2           (ii)\; 0.35\div 5         (iii)\; 2.48\div 4            (iv)\; 65.4\div 6

             (v)\; 651.2\div 4     (vi)\; 14.49\div 7      (vii)\; 3.96\div 4           (viii)\; 0.80\div 5

            

Answers (1)
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As we know, while dividing decimal, we first express the decimal in term of fraction and then divides it,

And

Dividing by a number is equivalent to multiplying by the reciprocal of that number. So

So

  (i)\; 0.4\div 2     

\; 0.4\div 2=\frac{4}{10}\div2=\frac{4}{10}\times\frac{1}{2}=\frac{2}{10}=\frac{1}{5}

(ii)\; 0.35\div 5        

\; 0.35\div 5=\frac{35}{100}\div5=\frac{35}{100}\times\frac{1}{5}=\frac{7}{100}=0.07

(iii)\; 2.48\div 4    

\; 2.48\div 4=\frac{248}{100}\div4=\frac{248}{100}\times\frac{1}{4}=\frac{62}{100}=0.62

 (iv)\; 65.4\div 6

\; 65.4\div 6=\frac{654}{100}\div6=\frac{654}{100}\times\frac{1}{6}=\frac{109}{100}=1.09

 (v)\; 651.2\div 4

\; 651.2\div 4=\frac{6512}{10}\div4=\frac{6512}{10}\times\frac{1}{4}=\frac{1628}{10}=162.8

 (vi)\; 14.49\div 7    

\; 14.49\div 7=\frac{1449}{100}\div7=\frac{1449}{100}\times\frac{1}{7}=\frac{207}{100}=2.07

(vii)\; 3.96\div 4        

\; 3.96\div 4=\frac{396}{100}\div4=\frac{396}{100}\times\frac{1}{4}=\frac{99}{100}=0.99

 (viii)\; 0.80\div 5

 \; 0.80\div 5=\frac{80}{100}\div5=\frac{80}{100}\times\frac{1}{5}=\frac{16}{100}=0.16 

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