\[\boxed{\mathbf{2.2}\mathbf{61}}\]
\[1)\ 3,75\ :1,25 = 375\ :125 = 3\]
\[2)\ 3 - 0,75 = 2,25\]
\[3)\ 2,25\ :1,5 = 22,5\ :15 = 1,5\]
\[4)\ 1,5 + 0,75 = 2,25\]
\(1)\ 14 - 12,725 = 1,275\)
\[2)\ 11,2 - 7,95 = 3,25\]