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3Â¥: Originally posted by gisjun at 2015-03-24 11:03:23
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4Â¥2015-03-24 12:32:44
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feixiaolin

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20:
20*5=100
1) 20*4=80;
            20=3*5 + 5*1
               =3*4 + 4*2
               =3*3 + 6*1 + 3*1 + 2*1
               =3*2 + ¡­¡­¡¢
         
2) 20*3=60;   40=5*7+ 3*1 +2*1

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2Â¥2015-03-23 23:10:37
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gisjun

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ÒýÓûØÌû:
2Â¥: Originally posted by feixiaolin at 2015-03-23 23:10:37
20:
20*5=100
1) 20*4=80;
            20=3*5 + 5*1
               =3*4 + 4*2
               =3*3 + 6*1 + 3*1 + 2*1
               =3*2 + ¡­¡­¡¢
         
2) 20*3=60;   40=5*7+ 3*1 +2*1

¡­ ...

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3Â¥2015-03-24 11:03:23
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gisjun

ľ³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
4Â¥: Originally posted by feixiaolin at 2015-03-24 12:32:44
¸öÈËÈÏΪ×îÊ¡Ðĵİ취¾ÍÊÇÕûÒ»¸öС³ÌÐò£¬½»¸ø¼ÆËã»ú£¬ÅÜÉÏ100Íò´Î£¬ÊýÃëºóÖ»¿´½á¹û¡£...

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