9+29+299+3999+49999我要简便算式

问题描述:

9+29+299+3999+49999我要简便算式

9+29+299+3999+49999
=10-1+30-1+300-1+4000-1+50000-1
=50000+4000+300+30+10-5
=54340-5
=54335