问题 解答题

543+545+547+549+551=______×______.

答案

543+545+547+549+551,

=(547-4)+(547-2)+547+(547+2)+(547+4),

=(547+547+547+547+547++(2-2+4-4),

=547+547+547+547+547,

=547×5.

故答案为:547,5.

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