混合运算/百变趣味翻翻卡
Description:
海豚低幼馆编著的《混合运算》的内容主要包括基础的减法运算，以通过精彩有趣的图画和游戏的方式，让孩子进入奇妙的数学的世界；通过有针对性的练习学习，加深孩子对数学的认知，从而为孩子进一步的数学学习打下坚实的基础。
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