解:?$(1)$?明明的解法從第三步開始出現(xiàn)錯誤,改正:
原式?$=(-4\frac {2}{3})+(-1\frac {5}{6})+18\frac {1}{2}+(-13\frac {3}{4})$?
?$=[(-4)+(-\frac {2}{3})]+[(-1)+(-\frac {5}{6})]+18+\frac {1}{2}+ [(-13)+(-\frac {3}{4})]$?
?$=[(-4)+(-1)+18+(-13)]+[(-\frac {2}{3})+(-\frac {5}{6})+\frac {1}{2}+(-\frac {3}{4})]$?
?$=0+(-\frac {7}{4})=-\frac {7}{4}$?
?$(2)(-102\frac {1}{6})-(-96\frac {1}{2})+54\frac {2}{3}+(-48\frac {3}{4})$?
?$=(-102\frac {1}{6})+96\frac {1}{2}+54\frac {2}{3}+(-48\frac {3}{4})$?
?$=[(-102)+(-\frac {1}{6})]+96+\frac {1}{2}+54+\frac {2}{3}+[(-48)+(-\frac {3}{4})$?
?$=[(-102)+96+54+(-48)]+[(-\frac {1}{6})+\frac {1}{2}+\frac {2}{3}+(-\frac {3}{4})]$?
?$=0+\frac {1}{4}=\frac {1}{4} $?