I assign this homework to my students at the beginning of our doubles and doubles plus one unit. It provides the students with a visual when solving the equations. There is also a written component that has students notice patterns as well as discuss the strategy they used to solve the equations.
Students can use the dots on the dominoes to help write and solve their doubles and doubles plus one fact.
Please provide any feedback you may have, it's always helpful for me. Also, please rate the product if you have time. Thanks!