精华 Math AMC Math AMC8基础入门 American Mathematics Competitions 8, is a middle school-level mathematics competition in the United States. It is designed for students in grades 6, 7, and 8.
精华 Math AMC Math AMC10基础入门 is part of the American Mathematics Competitions and is aimed at high school students. Specifically, the AMC 10 is designed for students in grades 10 and below.