199+199+100+199+200+199+300+199+400+5
=(199×5+5)+(100+200+300+400)
=(199+1)×5+1000
=1000+1000
(199+1)+(299+1)+(399+1)+(499+1)+(599+1)
33333X3X22222+33333X33334
=33333X(3×22222+33334)
=33333X(66666+33334)
=33333X100000
591X482+600-482
=591X482-482+600
=590x482+600
=(600-10)X482+600
=600X482-10X482+600
=600X483-4820
=289800-4820
591X482+118
=591X(600-118)+118
=591X600-591X118+118
=591X600-590X118
=591×600-(600-10)X118
=591X600-600X118+118×10
=(591-118)x600+1180
=473x600+1180
=283800+1180
4+6+...+20+1-3-5-...-19=
4+6+...+20+1-3-5-...-19=
199+299+399+499+599+5=
99999x22222+33333x33334=
591x482+118=
199+299+399+499+599+5=
99999x22222+33333x33334=
591x482+118=
数学人气:692 ℃时间:2020-03-24 05:29:15
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