{"type":"rich","version":"1.0","title":"Addition and Subtraction Fluency","description":"Players match multi-digit computation problems with their correct sums or differences. The pairs give quick fluency practice with standard algorithm addition and subtraction across a range of whole-number values. (4.NBT.B.4)","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1774337009053&hashid=xVK31y3zjn","html":"<iframe src=\"https://arcade.padlet.com/embed/xVK31y3zjn\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}