【精品】正方体的认识

1、正方体的认识?co?18? oc? ?8ao? ? ?8?a?: ?ria? ?8?8正方体的认识?o?a ?o?8a? ?8宋? ?8oe? ?灄焛 ?1? ?15焛8n?1? ?rrl?1?1?1?rrl?n耀1?1焛1? ?吾 ? ? ?吾 ?c?正方体的认识 ?1焛1焛5灄焛? ?吾 ? ?吾? ?吾 ?c? ?c? ?吾 ?c?正方体的认识 ?r?正方体的认识?8?881co? 6 ?ta ?1? ?8o?-?o? ?o8?a ?2 co?.? ?881co? c?8宋8o? ?8?8o8?i?2 ?宋? a?正方体的认识?8?881co? 12 ?o8 ?1? ?8o?-?o? 4

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5、1l 正方体的认识?8?:?2? ?i8o? ?8宋?o ? ?8?宋 ?t?1? ?宋?宋? ? o? o?1? ?8t?:（1）4cm4cm4cm? ?a8?8宋?o ?8a? ?宋1? ( ?881co? )? ?1?12 ?888o8 ?8? ?8? ) ( o8?8?宋. 48正方体的认识2. ?a8?8? ?宋?a8o?e?: co? ?8o8?1? ?8宋8i1? ? ?8o8?1? ?8宋8i1? ?a?.?8?a 6 ? ?ra ?6 ?8? ?1?2? ?81?. ( )o8? ?8?a 2 ?ra ?8? ?1?2? ?1? 4 ?ra ?2 co? ? ?81?. ( ) ?1llr? 6 ?r耀 12 ?1r 8?1rr r?1l. ( ) ?1llr? 6 ?r耀 ?1?r? 8?15?n? 1?rl-灄 ?n? 12 ?1l11r ?rr5lrr 1-灄 ?n? r?1l. ( )正方体的认识?88?2? 8宋 ?8t?o8? ?8?a ?88o8 ?88o