{"type":"rich","version":"1.0","title":"Find the Missing Number","description":"Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. (1.OA.D.8)","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1783989831391&hashid=v5j1MmVvjW","html":"<iframe src=\"https://arcade.padlet.com/embed/v5j1MmVvjW\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}