ttable. Thus t is in the region of rejection of Ho, so Ha is received. We can conclude that "There are differences in mathematics achievement between students who use a gradual exercise with students who do not use the exercise gradually." From the average values obtained by the students obtained the results of the experimental group and control group with 6,53 and group control 5,6 results show that there are effect positife of Exercise Staged Against Achievement of Mathematic Learning Roots and Form Numbers ranking in Class IX student of SMP N 1 Bojong Pekalongan Academic Year 2009/2010." />