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适合7岁以上学生的中文可打印数学密码游戏（第3级）。重点技能：两位数加减法。学生计算每道题，把准确答案与密码表配对，并解开四条秘密信息。3页PDF包含露米侦探狐狸彩色封面、完整练习页和详细答案页。前三个入门级别可免费下载。适用于课堂、数学活动中心、家庭学习、家庭作业、复习和分步思维训练。难度：简单。US Letter尺寸，按100%比例打印。
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中文数学密码游戏 03 - 数字城市任务（含答案）（免费）
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