Question

Write the given in short form.

$2\times \frac{1}{10}+1\times \frac{1}{100}+3\times \frac{1}{1000}+9\times \frac{1}{10000}$

Answer 1

Writing the short form

We can write given expanded form into its short form as below:

$\begin{array}{rcl}2\times \frac{1}{10}+1\times \frac{1}{100}+3\times \frac{1}{1000}+9\times \frac{1}{10000}& =& 0.2+0.01+0.003+0.0009\\ & =& 0.2139\end{array}$

Hence, the required short form is $0.2139$.