Now, you can clearly use them anyway you want & no one's going to be offended. I'm just mentioning how we used them when we first started out. The idea was that I wanted these facts memorized. My kids all ready know how to add & these weren't being used for fact review but for speed & memorization. Thus, giving them the answer was going to help them more then asking them to figure out the answer themselves.
One of the 2 & 4 fact family cards have bloopers on them, can you spot them? I need to correct it & then I will post the updated cards. If you find anymore errors please drop me a line and let me know. I'll post corrected cards if/when needed. In the mean time, you can download the original flashcards here.