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    

    .     .                       

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    

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  1.          

  2.                                                                                              2010PPT       2012             pdf                 PPT                                                         

  3.              ( )   ( )   10 8

  4.             4                     4   

  5.                                          ＝（＋）×2       ＝   ×4

  6. 2   4cm    3cm           （   ）   ①       ②         3cm 4cm 4cm （4+4+3）×2=22（cm） 4cm 3cm （4+3+3）×2=20（cm） 3cm

  7. 2   6cm    3cm           （   ）   ①       ②         3cm 6cm 6cm （6+6+3）×2=30（cm） 6cm 3cm （6+3+3）×2=24（cm） 3cm

  8. 6cm 3cm 3cm     30cm     24cm 6cm 6cm 3cm            

  9.          10cm             （   ）           80cm  （10+5+5）×4 = 80（cm）

  10.   45cm                      30×4＋40×2＋60×2＋45 =365（cm）           365      40×8＋45 =365（cm）

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