Math worksheet with penguin-themed addition and subtraction problems to solve a riddle.
A math worksheet for second grade students featuring 18 two-digit addition and subtraction problems arranged in a grid. The worksheet includes a riddle at the bottom: "What do penguins eat for lunch?" with a code to solve the puzzle. The top of the page shows three cartoon penguins holding flowers. The worksheet is titled "Smiling and Shining in Second Grade" and is credited to Shelly Sitz.