算19+199+1999+19999

问题描述:

算19+199+1999+19999

22116

20+200+2000+20000-1-1-1-1=22216

19+199+1999+19999
=20-1+200-1+2000-1+20000-1
=22220-4
=22216

20+200+2000+20000-4
=22216