\[\boxed{\mathbf{471.}}\]
\[530 - 260 = 270\]
\[270 + 260 = 530\]
\[720 - 380 = 340\]
\[340 + 380 = 720\]
\[945 - 370 = 575\]
\[575 + 370 = 945\]
\[823 - 514 = 309\]
\[514 + 309 = 823\]
\[631 - 45 = 586\]
\[586 + 45 = 631\]
\[700 - 53 = 647\]
\[647 + 53 = 700\]
\[501 - 44 = 457\]
\[457 + 44 = 501\]
\[904 - 7 = 897\]
\[897 + 7 = 904\]
\[1000 - 24 = 976\]
\[976 + 24 = 1000\]