Over the years, our family has used many a set of flash cards to practice math facts. I have invested in several sets - some excellent and some not so much. See the bottom of this post for my favorite purchased flash cards that are tried-and-true. Now that my youngest son is working diligently on learning addition facts by heart, I thought it was time to create a printable set of addition flash cards for us to use for playing math games. I am making this a free set of horizontal addition flash cards, so please feel free to download