非常感谢1+1/3+1/6+1/10+1/15+1/21+1/36+1/45+1/55、它们的和是多少.

求分中……若满意还请采纳、
1+1/3+1/6+1/10+1/15+1/21+1/36+1/45+1/55
=9/6+1/10+1/15+1/21+1/36+1/45+1/55
=16/10+1/15+1/21+1/36+1/45+1/55
=25/15+1/21+1/36+1/45+1/55
=36/21+1/36+1/45+1/55
=12/7+1/36+1/45+1/55
=12/7+1/36+4/99
=12/7+27/396
=4941/2772
=549/308
我不会简便方法,若有疑问可以百度Hi、