美國common core一年級就開始數pizza的分數了
七年級才開始學分數? 這個比美國慢了好幾年啊
所有跟帖:
• You want to make me cry! -Rockeymountain- ♀ (0 bytes) () 06/29/2016 postreply 13:13:51
• You want to make me cry! -Rockeymountain- ♀ (0 bytes) () 06/29/2016 postreply 13:13:51
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