5 years & up. Match totals with equations in a whole new way with Addition & Subtraction Dominoes by Junior Learning. Each domino features an answer side and an equation side. In order to win the game you must get rid of all of your dominoes by matching the ends correctly to other dominoes on the playing field. No part of the domino can touch a non-matching domino, just like in a classic game of dominoes. Each tin includes 28 Dominoes. Purchase as a set or individually.