{"type":"rich","version":"1.0","description":"Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, using equations with a symbol for the unknown number. (1.OA.A.2)","title":"Three Addend Addition Problems","width":720,"html":"<iframe src=\"https://arcade.padlet.com/embed/60Km9GB6K7\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","height":480,"provider_name":"Padlet Arcade","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1785282818949&hashid=60Km9GB6K7","provider_url":"https://arcade.padlet.com"}