\[\boxed{\text{6.11}\text{9}\text{.}}\]
\[\textbf{а)}\ 0,69 - 0,36 = 0,33\ \]
\[\textbf{б)}\ 11,05 - 2,38 = 8,67\ \]
\[\textbf{в)}\ 4,1 - 0,07 = 4,03\ \]
\[\textbf{г)}\ 27,02 - 3,9 = 23,12\ \]
\[\textbf{д)}\ 17 - 1,38 = 15,62\ \]
\[\textbf{е)}\ 12 - 0,05 = 11,95\ \]
\[\textbf{ж)}\ 9,46 - 3,46 = 6\ \]
\[\textbf{з)}\ 306,33 - 80,506 = 225,824\ \]
\[\textbf{и)}\ 0,049 - 0,00286 = 0,04614\ \]