找出下面三个最简真分数求和的规律计算下题1/42十5/42十11/42十13/42十17/42十1
找出下面三个最简真分数求和的规律计算下题1/42十5/42十11/42十13/42十17/42十19/42十23/42十25/42十29/42十31/42十37/42十4...
找出下面三个最简真分数求和的规律计算下题1/42十5/42十11/42十13/42十17/42十19/42十23/42十25/42十29/42十31/42十37/42十41/42
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