29+299+2999+29999+299999=?怎么简算
问题描述：
29+299+2999+29999+299999=?怎么简算
答
30-1+300-1+3000-1+30000-1+300000-1
=333330-5
=333325
答
=30+300+3000+30000+300000-(1+1+1+1+1)
=333330-5
=333325
答
(30-1)+(300-1)+(3000-1)+(30000-1)+(300000-1）
=30-1+300-1+3000-1+30000-1+300000-1
=33330-5
=33325
答
30+300+3000+30000+300000-5=333325
答
29+299+2999+29999+299999
=(30-1)+(300-1)+(3000-1)+(30000-1)+(300000-1)
=30+300+3000+30000+300000-5
=333330-5
=333325