9又3/5+99又3/5+999又3/5+9999又3/5+99999又3/5
=(9+99+999+9999+99999) +(3/5+3/5+3/5+3/5+3/5)
=(9+99+999+9999+99999) +3
=(10+100+1000+10000+100000)-5 +3
=111110-2
=111108
9又3/5+99又3/5+999又3/5+9999又3/5+99999又3/5
=10-2/5+100-2/5+1000-2/5-10000-2/5+100000-2/5
=111110-5X2/5
=111110-2
=111108