1、483-484*966/968
=483-966*(484/968)
=483-966*(1/2)
=483-483
=0
2、9000/125/2/5/8
=9000/[(125*8)*(2*5)]
=9000/(1000*10)
=0.9
3、36*111+888*8
=36*111+111*8*8
=36*111+111*64
=(36+64)*111
=100*111
=11100
4、298+1008+97
=(300-2)+(1000+8)+(100-3)
=300+1000+100-2+8-3
=1400+3
=1403
5、2568-2005
=2568-(2000+5)
=2568-2000-5
=568-5
=563
6、404*25
=(400+4)*25
=400*25+4*25
=10000+100
=10100
7、（450-125）*（83-64）
=325*19
=325*(20-1)
=325*20-325*1
=6500-325
=6175