I created this practice worksheet for my students to practice using their strategies to add 2-digit numbers. This could also be used to teach the strategies initially, such as "breaking up the numbers". For example - 67 + 21, 60 + 20 = 80, 7 + 1 = 8, 80 + 8 = 88!! I also have this worksheet available using different clipart for subtraction! These practice sheets could be good morning work, seatwork during math centers, homework or even a quiz! Enjoy!