来自陆旭的问题
简便计算1-5/6+7/12-9/20+11/30-42/13+15/56-17/721/1*2*3+1/2*3*4.+1/9*10*111+1/1+2+1/1+2+3+.1/1+2+3.100
简便计算
1-5/6+7/12-9/20+11/30-42/13+15/56-17/72
1/1*2*3+1/2*3*4.+1/9*10*11
1+1/1+2+1/1+2+3+.1/1+2+3.100


简便计算1-5/6+7/12-9/20+11/30-42/13+15/56-17/721/1*2*3+1/2*3*4.+1/9*10*111+1/1+2+1/1+2+3+.1/1+2+3.100
简便计算
1-5/6+7/12-9/20+11/30-42/13+15/56-17/72
1/1*2*3+1/2*3*4.+1/9*10*11
1+1/1+2+1/1+2+3+.1/1+2+3.100
1-5/6+7/12-9/20+11/30-42/13+15/56-17/72=1-1/2-1/3+1/3+1/4-1/4-1/5+1/5+1/6-1/6-1/7+1/7+1/8-1/8-1/9=1/2-1/9=7/181/1*2*3+1/2*3*4.+1/9*10*11=1/2(1/1*2-1/2*3+1/2*3-1/3*4+……+1/9*10-1/10*11)=(1/2)*(1/2-1/1...