Love this game for number sense and math facts!
I recently attended a national math conference where I was reminded once again of how important it is to know not just math facts, but to have the number sense that goes along with it. We want our kids to be able to compose and decompose (put together and take apart) numbers fluently. I was introduced to a fantastic online or app game called Kakooma created by Greg Tang. It is available online here or search for Kakooma on your phone apps (available on apple and android). You have options of Addition, Times, Addition Pro, Time Pro, Legacy and Negative Numbers. Best of all, they are free and great for all ages.