1-1/6+1/42+1/56+1/72+1/90

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1-1/6+1/42+1/56+1/72+1/901-1/6+1/42+1/56+1/72+1/901-1/6+1/42+1/56+1/72+1/901-1/6+1/42+1/56+1/72+1/90

1-1/6+1/42+1/56+1/72+1/90
1-1/6+1/42+1/56+1/72+1/90

1-1/6+1/42+1/56+1/72+1/90
1-1/6+1/42+1/56+1/72+1/90
=1-(1/6)+(1/6)-(1/7)+(1/7)-(1/8)+(1/8)-(1/9)+(1/9)-(1/10)
=1-(1/10)
=9/10

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+1/12+1/20+1/30+1/42+1/56+1/72 1/6+1/12+1/20+1/30+1/42+1/56+1/72 简便计算 1-1/6+1/42+1/56+1/72+1/90+1/110怎么简便 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? 1-1/6+1/42+1/56+1/72+1/90+1/110= 1/6+1/12+1/20+1/30+1/42+1/56+1/72 1/6+1/12+1/20+1/30+1/42+1/56+1/72=? 1/42+1/56+1/72+1/90+1/110 1/30+1/42+1/56+1/72+1/90 1/42+1/56+1/72+1/90+1/110 1/30+1/42+1/56+1/72+1/90 1/42+1/56+1/72+1/90+1/110 1-1/6+1/42+1/56+1/72+1/90怎么计算 计算1-1/6+1/42+1/56+1/72+1/90分数