我倒认为画线法很好，慢是慢，但更贴近乘法的本质：将高位数乘法转化为一位数的乘法
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- Title: 《波兰式手算，以及人的境况》的评论
- Channel Number: 19338680
- Language: Chinese
- Registered On: June 28, 2013, 3:40 am
- Number of Articles: 8
- Latest Snapshot: February 13, 2015, 4:21 pm
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