1、18-4=15+4=18-4=15+4=17-15=16+2=17-15=16+2=16-3=14+3=16-3=14+3=18-3=13+5=18-3=17+1=15-2=16+3=15-12=16+3=18-15=15+2=18-5=15+2=17-6=14+2=17-6=14+2=16-14=17+2=16-14=17+2=18-6=15+3=18-6=15+3=17-14=14+3=19-14=13+3=19-3=14+4=17-14=14+4=19-15=12+4=19-8=12+3=18-16=13+3=10-4=16+1=16-13=13+5=19-6=14+6=17-4=17-

2、15=10-7=13+2=480630=900+75=30020=9.3-2.5=6204+70=73-65=3609=93-67=925-242040020=57+36=3505=(530+250)6=6.25-1.37=64+28=173(39+46)30=3273=22+36=363=74337+45=63-18=100-34=7.36-3.24=2005=242168152520-400600+35=27+38=1204=730-(560-280)=1001930402546905+80=9.5-4.5=86-27=6.8-5.4=306(200-185)1-2/7=8082.8+1.

3、5=(184+26)60=1566786=4/9+3/9=5/8-2/8=754490750=700+153=60020=9.1-2.5=7206+70=83-66=64080=93-75=925-202796030=57+39=6305=(560+350)7=6.53-1.39=64+35=573(39+41)60=3186=53+36=963=74537+46=63-25=100-46=7.61-3.24=3208=84236152320-300600+315=217+38=2404=760-(530-380)=1006730802453705+60=7.8-4.5=86-23=9.8-5

4、.9=206(300-285)1-3/6=8072.8+5.4=(163+47)60=1877266=5/8+3/8=6/7-2/7=5738-4=5+4=7-4=10-4+3=9-3-4=7-5=6+2=9-8=7-3+4=10-6-2=6-3=4+3=10-4=3+5+2=8-3+4=8-3=7+1=9-6=7-5+6=2+3+4=5-2=6+3=10-7=9-2+3=10-3+2=8-5=5+2=4+4=6+4-8=6+3-7=7-6=4+2=7+3=8-5+7=7-5+6=6-4=7+2=6+1=9-7+6=10-6-4=8-6=5+3=4+6=8+2-5=9-3-3=9-4=3+3=

5、3+2=10-5+2=3+7-5=10-4+3=9-3-4=9-8-6=7-3+4=10-6-2=2+7-5=3+5+2=8-3+4=4+3-6=7-5+6=2+3+4=7+3-6=9-2+3=10-3+2=8-2-3=6+4-8=6+3-7=8-8+6=8-5+7=7-5+6=7-4+5=9-7+6=10-6-4=3-2+8=8+2-5=9-3-3=6+2-3=10-5+2=3+7-5=8-6+5=8-4=5+4=8-4=5+4=7-5=6+2=7-5=6+2=6-3=4+3=6-3=4+3=8-3=3+5=8-3=7+1=5-2=6+3=5-2=6+3=8-5=5+2=8-5=5+2=7-6=4+2=7-6=4+2=6-4=7+2=6-4=7+2=8-6=5+3=8-6=5+3=7-4=4+3=9-4=3+3=