Question

简便计算：1+1/2-5/6+7/12-9/20+11/30 分数计算

Answer 1

1+1/2-5/6+7/12-9/20+11/30
=1+1/2-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)
=1+1/2-1/2-1/3+1/3+1/4-1/4-1/5+1/5+1/6
=1+1/6
=7/6