1/42+1/56+1/72+1/90= 用简便方法计算.谁先回答对,完整,
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42/1 + 56/1 +72/1 + 90/1 + 110/1 + 132/1=?错了,是1/42+1/56+1/72+1/90+1/110+1/132
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+1/110=
1/12+1/20+1/30+1/42+1/56+1/72+1/90=?
1/42+1/56+1/72+1/90+1/110+1/132=?
1/30+1/42+1/56+1/72+1/90+1/110=?
1/30+1/42+1/56+1/72+1/90=简便计算
1/42+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==
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=多少
1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=?等于多少?
1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132=?能不能简便运算?
1/30+1/42+1/56+1/72=