1-1/6 +1/42 +1/56 +1/72
1-1/6 +1/42 +1/56 +1/72
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/2+1/6+1/20+1/30+1/42+1/56+1/72等于几?
1/2+1/6+1/20+1/30+1/42+1/56+1/72等于多少?
1/6+1/12+1/20+1/30+1/42+1/56+1/72 简便计算
(1)1-1/6+1/42+1/56+1/72+1/90
1/30+1/42+1/56+1/72+1/90
1/42+1/56+1/72+1/90+1/110
42/1+1/56+1/72+1/90+1/110
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+.1/9900
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/10
1-(1/2)+(1/6)+(1/12)+(1/20)+(1/30)+(1/42)+(1/56)+(1/72)+(1/9