\[\boxed{\mathbf{49.}}\]
\[100 + 50 + 2 = 152\]
\[500 + 30 + 8 = 538\]
\[400 + 70 + 3 = 473\]
\[800 + 10 + 9 = 819\]
\[200 + 60 = 260\]
\[500 + 10 = 510\]
\[700 + 20 = 720\]
\[900 + 30 = 930\]
\[100 + 7 = 107\]
\[600 + 2 = 602\]
\[400 + 3 = 403\]
\[800 + 5 = 805\]