1.二十三-三又九分之八/八分之三*二又七分之一
=23-35/9*8/3*15/7
=23-200/9
=23-22又2/9
=7/9
2.八点八*六分之五+五分之二/十六
=44/5*5/6+2/5*1/16
=22/3+1/40
=880/120+3/120
=883/120