Question

Add $12.13$ and $6.391$ by converting them into fractions.

• A. $18.521$
• B. $18.421$
• C. $16.521$
• D. $18.512$

Answer 1

The correct option is A $18.521$

First, we convert the given decimals into like fractions with denominator as $1000$.
$12.13=12.130=\frac{12130}{1000}$

$6.391=\frac{6391}{1000}$

$12.13+6.391=\frac{12130}{1000}+\frac{6391}{1000}$

$=\frac{(12130+6391)}{1000}$

$=\frac{\left(18521\right)}{1000}=18.521$

$\therefore 12.13+6.391=18.521$