I don't really understand the IEEE stuff, but I do recall being taught the following many moons ago...
??
-5.[(0 * 0.5) + (1 * 0.25) + (1 * 0.125) + (1 * 0.0625)] = -5.4375
??
-5.[(0 * 0.5) + (1 * 0.25) + (1 * 0.125) + (1 * 0.0625)] = -5.4375