1、95.5-81/7.5-9.2
=95.5-10.8-9.2
=95.5-（10.8+9.2）
=95.5-20
=75.5
2、9.99/（50*1.11）
=9.99/1.11/50
=9/50
=0.18
3、【8+（0.5-0.2）/1.2】*0.24
=【8+0.3/1.2】*0.24
=【8+0.25】*0.24
=8*0.24+0.25*0.24
=1.92+0.06
=1.98