2-1(a)(12.062)10=(100001舍入误差<28 2-2(b)(10111.010)2=25+23+22+222+2<(A63125) 23()(6237)86×82+2×81+3×8+7×81+780 (403984375)10 =(11001001111238 =(110010012 =(000110010011111100216 =(193FC)16 26(c)(0011010001110001)210=(3471)102-1(a) (12.062)10=(1100.00001111)2 舍入误差<2-8 2-2(b)(101110.0101)2=25+23+22+21+2-2+2-4=(46.3125)10 2-3(c)(623.77)8=6×8 2+2×8 1+3×8 0+7×8 -1+7×8 -2 =（403.984375）10 =（110 010 011.111 111）2-8 =（110010011.111111）2 =（0001 1001 0011.1111 1100）2-16 =（193.FC）16 2-6(c)（0011 0100 0111 0001）2-10 =（3471）10