Practice adding and subtracting integers on St. Patrick's Day with this color by number(letter) worksheet! There are 26 add and subtract integer problems. Students solve the problems and crack the color code with the correct answer. Then color the picture accordingly. Letters are used as a key to avoid any possible student confusion of how to color the picture. Picture and problems are all on one page to conserve on copying! Picture is appropriate for all ages so this worksheet can be used for elementary as well as older students that struggle with this skill. Also, the picture colors are not predictable so students must do the math- no shortcuts!Answer key included.