Halloween pixel art! Addition and subtraction mystery pixel art with a spooky Halloween theme perfect to practice basic facts and keep students engaged this October. Students solve addition and/or subtraction problems to auto-generate one of 5 themed pixel art images plus a "secret message." This self-checking, editable, digital activity works with ANY device with Google™ Sheets (iPads, Chromebooks, and more) and includes 4 differentiated versions. ★ Low Prep: Just assign the sheet in Goo