This game is played like Go Fish. Only instead of asking for like numbers you are asking for numbers that will add up to a sum of 10. For instance, if you have a 4 you'd ask for a 6. This can be altered into Make 20 when students are ready, simply by recutting the deck differently or using it as a class project to create your own! I have a double ten frame template to print on index cards available in my shop to make this activity easily accessible to all students!