计算。*F)_;W(y0L/v6_'W
9＋39=1o1c+D)R1P8F*F)_;W(y0L/v6_'W
74－4=-u9t.e/k0w3B1X'N6F:p2o*o5S*F)_;W(y0L/v6_'W
37＋4=-@-I/j6G*F)_;W(y0L/v6_'W
40＋28=1_5R5M4j9u6U1J*F)_;W(y0L/v6_'W
8＋27=)R/]5v*F)_;W(y0L/v6_'W
74－（80－50）=4I;t3[;p*v*F)_;W(y0L/v6_'W
5＋78－40=0H8d/A+N/Y*F)_;W(y0L/v6_'W
51＋20－30=3M-@(\6n(n*F)_;W(y0L/v6_'W