1-1/6+1/42+1/56+1/72
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1-1/6+1/42+1/56+1/721-1/6+1/42+1/56+1/721-1/6+1/42+1/56+1/721/42=1/6-1/71/56=1/7-1/81/72=1/8-1/9所以原式
1-1/6+1/42+1/56+1/72
1-1/6+1/42+1/56+1/72
1-1/6+1/42+1/56+1/72
1/42=1/6 - 1/7
1/56=1/7 - 1/8
1/72=1/8 - 1/9
所以原式=1-1/6+1/6-1/7+1/7-1/8+1/8-1/9 = 1-1/9 = 8/9
答案=8/9 因为很难打出来。所以只有答案了。
8/9
1-1/6+1/42+1/56+1/72
1-1/6 +1/42 +1/56 +1/72
1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90
42/1+56/1+72/1+90/1+110/1
能简算的要简算 1/30+1/42+1/56+1/72能简算的要简算 1/30+1/42+1/56+1/72
1/42+1/56+1/72+1/90十1/110怎么计算
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?详细
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
1/42+1/56+1/72+1/90+1/110怎么计算
递等式计算:1/42+1/56+1/72+1/90+1/110
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=?