>
数学
>
计算：
(1995.5−1993.5)÷1998×1999
1997
1998
÷
1
1999
．（得数保留三位小数）
人气：177 ℃ 时间：2020-02-05 02:14:52
解答
原式=
2
1998
×(2000−
1
1998
)×1999
，
=
(4000−
2
1998
)×
1998+1
1998
，
=
(4000−
2
1998
)×(1+
1
1998
)
，
=
4000+
4000−2
1998
−
2
1998×1998
，
=
4000+2+
2
1998
−
2
1998×1998
，
≈4002.001．
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