$546->$549

本文由 nickname-vc-199569 在 2014-11-27 發表於 "數學" 討論區

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    nickname-vc-199569
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    At the topic ' Arithmetic Challenges'level 1 1.2.1 the question about buying balloon,when it should be '$546',it showed '$549'
    Did anyone notice?
     
    #1 nickname-vc-199569, 2014-11-27