This is a great resource to use to connect estimation and multiplication of multi-digit numbers. You can use this game as a center activity or as a review lesson.
I used this for a few days in my class and kept mixing up partners; my students had a great time battling against their classmates! The ability to create their own numbers and choose their target estimation makes this game challenging yet fun for students at every level.
Don't forget to leave feedback after you use this fun activity in your classroom!