29+299+2999+29999+299999=?怎么简算

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29+299+2999+29999+299999=?怎么简算29+299+2999+29999+299999=?怎么简算29+299+2999+29999+299999=?怎么简算29+299+299

29+299+2999+29999+299999=?怎么简算
29+299+2999+29999+299999=?怎么简算

29+299+2999+29999+299999=?怎么简算
29+299+2999+29999+299999
=(30-1)+(300-1)+(3000-1)+(30000-1)+(300000-1)
=30+300+3000+30000+300000-5
=333330-5
=333325

30+300+3000+30000+300000-5=333325

30-1+300-1+3000-1+30000-1+300000-1
=333330-5
=333325

=30+300+3000+30000+300000-(1+1+1+1+1)
=333330-5
=333325

(30-1)+(300-1)+(3000-1)+(30000-1)+(300000-1)
=30-1+300-1+3000-1+30000-1+300000-1
=33330-5
=33325