Drills and chants get a bad rap - but what better way is there to get your students into Spanish mode and get your cross-curricular skills in? I always start each class with a phonics drill and a math drill.
This slideshow uses only slides with hidden answers to create flashcards for more independent work. If you'd like the fuller version that guides the class or small groups in chorally reciting ADDITION equations, you can find that here.
If you'd prefer a PDF instead of a PowerPoint, you can find that here, too.
For more Spanish math drills, check out these packages:
Addition Drills X+1 through X+14
Addition Flashcards X+1 through X+14
Four Basic Operations Drills
Four Basic Operations Flashcards