{"type":"rich","version":"1.0","title":"Missing Number Challenge","description":"Players complete number sentences such as 426 + ___ = 700 or 853 - ___ = 421 by dragging the correct numbers into the blanks. The activity builds flexibility with missing addends and subtrahends while reinforcing the relationship between addition and subtraction. (3.NBT.A.2)","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1774336038477&hashid=60Km9GNoK7","html":"<iframe src=\"https://arcade.padlet.com/embed/60Km9GNoK7\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}