This document includes 18 cards that are premade for the activity "I have __ Who has ___." This set gives students an opportunity to mentally round numbers to the nearest hundred and correctly read numbers with 3 to 4 digits aloud. I have found that this activity helps my students to understand the concept of rounding and reading numbers. If I have extra students, then they have the role of judge or leader. I hope that you and your students enjoy this activity!