1-1⼀2+1⼀3-1⼀4+1⼀5-1⼀6+……+1⼀49-1⼀50=?

小学的奥数题,麻烦各位大神写一下详细的步骤
2024-12-02 03:19:09
推荐回答(2个)
回答1:

1/2 )+(1/3+1/5+...+1/49)-(1/4+1/6+1/8+……1/50)]/(1/26+1/27+...+1/50)=[1/2+(1/3+1/5+...+1/49)-1/2*(1/2+1/3+1/4+……1/25)]/(1/26+1/27+.....

回答2:

1-1/2+1/3-1/4+1/5-1/6+1/7-1/8+1/9-1/10+……+1/49-1/50
=1+1/2+1/3+……+1/50-2*(1/2+1/4+1/6+……+1/50)
=1+1/2+1/3+……+1/50-(1+1/2+1/3+……+1/25)
=1/26+1/27+1/28+……+1/50