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二年级：绳子对折一次，再剪6次，剪成了几段？快乐父子俩
二年级：绳子对折一次，再剪6次，剪成了几段？这样的父爱真好
二年级上册《数学思维训练》，爸爸这样启发孩子掌握方法33/39
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二年级：绳子对折一次，再剪6次，剪成了几段？这样的父爱真好
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