{"type":"rich","version":"1.0","title":"Subtraction by Tens","description":"Players sort subtraction equations into three categories: difference of 0, difference of 10-30, and difference of 40-80. By classifying problems like 60 - 60, 50 - 20, and 90 - 10, students notice patterns in subtracting tens. (1.NBT.C.6)","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1774334322120&hashid=BGpq1z4XpQ","html":"<iframe src=\"https://arcade.padlet.com/embed/BGpq1z4XpQ\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}