{"type":"rich","version":"1.0","title":"多位数乘法练习","description":"多位数乘法拖放活动，学生从包含混淆项的选项库中选择正确乘积","author_name":"Padlet TA","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1768604135468&hashid=9LKlJxE1jD","html":"<iframe src=\"https://arcade.padlet.com/embed/9LKlJxE1jD\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}