The mad scientist known to children around the world as Doctor Badmath is at it again! He lives to make kids’ lives more challenging, and he has created a new chemical that does just that ... it has the power to make addends disappear making math that much more difficult for students. Luckily, your students have learned how to use their subtraction to combat his evil tricks. Children must solve each problem as they make their way around the board. Their goal is to discover the antidote to Doctor Badmath’s evil creation to save young mathematicians around the world! This Smarten Up printable file folder game is a great way for kids to practice solving addition problems with missing addends.