1x2÷1＋2x3÷1＋3x4÷1＋4x5÷1＋5x6÷1等于?

分类: 作业答案 • 2021-12-28 16:58:19

问题描述：

答

错了
1÷(1x2)+1÷(2x3)+12/(3x4)+1÷(4x5)+1÷(5x6)
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6
=1-1/6
=5/6