Questão 2878046

\(\frac{2}{10}\ \cdot\ 10^{-5}.\)

\(\frac{2}{10}\ \cdot\ 10^{-3}.\)

\(\frac{2}{9}\ \cdot\ 10^{-4}.\)

\(\frac{22}{99}\ \cdot\ 10^{-5}.\)

\(\frac{2222}{9999}\ \cdot\ 10^{-6}.\)