请帮忙解下这道题，最好把方法说清楚。1+4/1+28/1+70/1+130/1+208/1

Question

好像要用拆分方法的，解题时别忘了用哦。

Answer 1

应该是1+1/4+1/28+1/70+1/130+1/208吧！
1/28＝(1/4-1/7)/3
1/70＝(1/7-1/10)/3
1/130＝(1/10-1/13)/3
1/208＝(1/13-1/16)/3
所以，
1+1/4+1/28+1/70+1/130+1/208
=1+1/4+(1/4-1/7+1/7-1/10+1/10-1/13+1/13-1/16)/3
=1+1/4+(1/4-1/16)/3
=1+1/4+1/12-1/48
=1又18分子15

Answer 2

1+1/4+1/28+1/70+1/130+1/208 =1+1/4+(1/4-1/13)/3
=1又18/15O (∩_∩)O哈哈~