This resource can be used to create flash cards with the operation on the one hand and on the other the answer. And it can also be used for playing pairs of flash cards.
To use the resource as "FlashCards" marked the first face printed as "FRONT" and reenter the sheet of paper into the printer and print the marked face as "BEHIND". If you have a printer that prints on both sides, it goes to the previous step.
If you want to use the resource as "Couples of flash cards" just print each face on a sheet of paper.