Crack the Code, Addition & Subtraction ,Picture Math Worksheets ,PreK - 2nd.Make math fun with this Crack the Code: Addition & Subtraction pack! Students solve math problems and use picture codes to reveal hidden numbers. Perfect for PreK, Kindergarten, 1st, and 2nd grade students. Includes both basic and missing number problems for extra challenge. Themes include Farm Animals, Ocean, Space, Weather, and Food! Great for math centers, morning work, small groups, or homework. Visual icons help s