\[\boxed{\mathbf{10.}}\]
\[32 - 13 = 32 - 10 - 3 =\]
\[= 22 - 3 = 19\]
\[41 - 15 = 41 - 10 - 5 =\]
\[= 31 - 5 = 26\]
\[53 - 14 = 53 - 10 - 4 =\]
\[= 43 - 4 = 39\]
\[61 - 24 = 61 - 20 - 4 =\]
\[= 41 - 4 = 37\]
\[54 - 35 = 54 - 30 - 5 =\]
\[= 24 - 5 = 19\]
\[72 - 34 = 72 - 30 - 4 =\]
\[= 42 - 4 = 38\]
\[75 - 46 = 75 - 40 - 6 =\]
\[= 35 - 6 = 29\]
\[83 - 37 = 83 - 30 - 7 =\]
\[= 53 - 7 = 46\]
\[94 - 58 = 94 - 50 - 8 =\]
\[= 44 - 8 = 36\]