\[\boxed{\mathbf{1211}\mathbf{\ (801)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{34}{10} = 3\frac{4}{10} = 3,4\]
\[2)\ \frac{3978}{1000} = 3\ \frac{978}{1000} = 3,978\]
\[3)\ \frac{9266}{100} = 92\frac{66}{100} = 92,66\]
\[4)\ \frac{2648697}{100000} = 29\ \frac{48697}{100000} =\]
\[= 29,48697\]