Math2
Dave's Math Tables: Spanish English Math Dictionary
Provides list of math terms and their Spanish translations. Great resource for English speaking teachers instructing Spanish speaking students.
National Institute of Educational Technologies and Teacher Training (Spain)
Ministerio De Educacion: Veintiocho Cerillas
Remove four matches to the center of the square then repositions the other matches in such a way that the sum of them on each side is 11.
Other
Matematicas Para Ninos: El Huevo De Chocolate (The Chocolate Egg)
This resource provides basic math activities in Spanish. Topics include division, math riddles and correcting equations.