小学奥数三年级 - 第1讲：加减法巧算 - 中文
Synopsis
欢迎一起学习三年级奥数。我们今天的学习内容是：加减法巧算。 参考答案： 例3: 11102 例5: 800 练习: 1. 111105; 2. 177; 3. 554 ...
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