\[\boxed{\mathbf{191.}}\]
\[184 + 200 = 384\]
\[427 - 300 = 127\]
\[516 + 400 = 916\]
\[325 + (199 + 1) = 325 + 200 =\]
\[= 525\]
\[658 - (299 + 1) = 658 - 300 =\]
\[= 358\]
\[834 - (499 + 1) = 834 - 500 =\]
\[= 334\]
\[416 + (301 - 1) = 416 + 300 =\]
\[= 716\]
\[237 + (505 - 5) = 237 + 500 =\]
\[= 737\]
\[955 - (703 - 3) = 955 - 700 =\]
\[= 255\]