Do your students already know how to multiply by 5s and 10s? Does your district calendar give you a whole day (or two) to teach this concept? Why not use Kagan Cooperative Learning to make students practice their facts without a mindless boring worksheet!
This document has Quiz Quiz Trade flashcards of multiplication by 5s and 10s. It also has "I have, Who has?" cards on multiplication by 5s and 10s.
I used this for my gifted 3rd graders and they loved it! After a short explicit lesson on multiplying by 5s and 10s, the students grasped the concept and were ready to practice using these two learning games.