1/30+1/42+1/56+1/72+1/90+1/110简便算法(过程)
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1/30+1/42+1/56+1/72+1/90+1/110简便算法(过程)1/30+1/42+1/56+1/72+1/90+1/110简便算法(过程)1/30+1/42+1/56+1/72+1/90
1/30+1/42+1/56+1/72+1/90+1/110简便算法(过程)
1/30+1/42+1/56+1/72+1/90+1/110简便算法(过程)
1/30+1/42+1/56+1/72+1/90+1/110简便算法(过程)
1/30+1/42+1/56+1/72+1/90+1/110
=(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1/5-1/11
=6/55
1-1/6 1/42 1/56 1/72 1/90 1/110 =1-1/6 1/6*7 1/7*8 1/8*9 1/9*10 1/10*11 =1-1/6 1/6-1/7 1/7-1/8 1/8-1/9
1/30+1/42+1/56+1/72+1/90
1/30+1/42+1/56+1/72+1/90
1/30+1/42+1/56+1/72 简算
1/30+1/42+1/56+1/72简便算法
1/30+1/42+1/56+1/72=
简算1/30+1/42+1/56+1/72=?
1/30+1/42+1/56+1/72=
30分之1+42分之一+56分之1+72分之一
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/12+1/20+1/30+1/42+1/56+1/72+1/90
1/12+1/20+1/30+1/42+1/56+1/72+1/90
1/6+1/12+1/20+1/30+1/42+1/56+1/72 简便计算
1/2+1/6+1/20+1/30+1/42+1/56+1/72等于多少?
1/2+1/6+1/20+1/30+1/42+1/56+1/72等于几?
1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/12+1/20+1/30+1/42+1/56+1/72+1/90=?
1/6+1/12+1/20+1/30+1/42+1/56+1/72=?