[中學] 103統測一題（0.9循環）
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已知循環小數 0.9（0.9循環）= 0.999999999999999999............
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設 a = 0.9 x 0.9，則下列何者正確
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(A) a<0.89 (B) a=0.89 (C) a<0.9 (D) a>0.9
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我知道0.9一直都有很多的不同看法，想請教這題大家的想法是B嗎？
還是不應該出這題呢？
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