计算(181²-61²)÷(302²-182²)谢谢

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计算(181²-61²)÷(302²-182²)谢谢
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计算(181²-61²)÷(302²-182²)谢谢
计算(181²-61²)÷(302²-182²)谢谢

计算(181²-61²)÷(302²-182²)谢谢
(181²-61²)÷(302²-182²)=(181+61)(181-61)÷(302+182)(302-182)=242*120÷484*120=1/2