Hello, Teaching Friends!
Here's a quick and fun way for your second graders to practice combinations of numbers that total twenty. There's lots of mental math here, since they'll be hunting for combinations of two, three, and four addends, and quite often finding a combination of ten along the way. For a little accountability piece (and because, let's face it, we all know that nobody can stand correcting a paper like this with all those crazy circles your kiddos will make!), on the back of the paper they'll be writing five of the combinations they find.
Looking for a puzzle for combinations of ten? Try Ten Again!