在一个长方形的铁板上截下一个三角形（如下图），剩余铁板的面积是多少？（单位：米）7`7O9@7s6A1E6O(t'Z6a+P0Y6A7h7m,W
7`7O9@7s6A1E6O(t'Z6a+P0Y6A7h7m,W
算式：提示4f:u-A-|2O,S2d+S.c9b*J4`7`7O9@7s6A1E6O(t'Z6a+P0Y6A7h7m,W
答：剩余铁板的面积是*T8l9S+H-X7B0k6V+q平方米。7`7O9@7s6A1E6O(t'Z6a+P0Y6A7h7m,W