100-98+96-94+92-90+…+8-6+4-2.
=(100-98)+(96-94)+(92-90)+…+(8-6)+(4-2),
=2×25,
=50;
故答案为:50.
100-98+96-94+92-90+…+8-6+4-2=_.
100-98+96-94+92-90+…+8-6+4-2=______.
数学人气:897 ℃时间:2020-02-02 16:56:25
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