题目内容
39999+3999+399+39.
39999+3999+399+39,
=39999+3999+399+(1+1+1+36),
=(39999+1)+(3999+1)+(399+1)+36,
=40000+4000+400+36,
=44436.
=39999+3999+399+(1+1+1+36),
=(39999+1)+(3999+1)+(399+1)+36,
=40000+4000+400+36,
=44436.
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