{"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 objects, drawings, and equations with a symbol for the unknown number to represent the problem. (1.OA.A.2)","title":"Adding Three Numbers","width":720,"html":"<iframe src=\"https://arcade.padlet.com/embed/nlp8AYWPKX\" 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=1785282861582&hashid=nlp8AYWPKX&key=social-preview-image-v4","provider_url":"https://arcade.padlet.com"}