I created this fun and festive, holiday-themed puzzle pack for my students to practice the math concept of part-part-whole. There are 3 sheets leveled from basic facts on up to 2-digit addition/subtraction. The idea would be for students to use their mental math skills to find the missing part to the puzzle, but they can use any strategy that works. I use these worksheets for either morning work or seatwork during math centers, but they could also be used for homework, guided or independent practice. With cute Santa, Rudolph and "Elfie" clipart, this can make learning basic math around the holidays even more FUN! I also have Thanksgiving and non-themed part-part-whole puzzle packs. Enjoy!