解ï¼
160÷4=40ï¼åç±³/å°æ¶ï¼
480÷40=12ï¼å°æ¶ï¼
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480÷160Ã4
=3Ã4
=12ï¼å°æ¶ï¼
æè
480÷ï¼160÷4ï¼
=480÷40
=12ï¼å°æ¶ï¼
çï¼è¡é©¶480åç±³éè¦12å°æ¶ã
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解ï¼è®¾è¡é©¶480åç±³éè¦Xå°æ¶ã
480ï¼X=160ï¼4
160X=480Ã4
X=480÷160Ã4
X=3Ã4
X=12
çï¼è¡é©¶480åç±³éè¦12å°æ¶ã
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