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(1996+1994+1992.+4+2)—(1+3+5.+1993+1995)详细解题步骤,
人气:325 ℃ 时间:2019-08-18 09:28:41
解答
=(1996-1995)+(1994-1993)+……+(4-3)+(2-1)
=1+1+1+……+1
=1×[(1995-1)÷2+1]
=1×998
=998
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