\[\boxed{\mathbf{161.}}\]
\[160 + 3 = 163\]
\[207 - 200 = 7\]
\[500 + 30 = 530\]
\[184 - 84 = 100\]
\[407 + 10 = 417\]
\[603 - 3 = 600\]
\[735 - 30 = 705\]
\[300 + 2 = 302\]
\[900 - 1 = 899\]
\[261 - 200 = 61\]
\[480 - 400 = 80\]
\[936 - 30 = 906\]