This is a powerpoint with subtraction flash cards. There are 60 problems with 60 answers. These are perfect for whole-group math games, small-group, centers, or independent practice. It is a great self-checking tool for students. Each answer is directly after the card.
I use these on my SMARTboard to play any game that I normally would have to hold up traditional flash cards. It is more convenient for me to just click the mouse or press enter than it is to hold the traditional cards.