The results of research on the leveling of students' critical thinking abilities in solving
mathematical problems can be summarized as follows: (1) students who are not critical (LCTA-0) can
only identify the given facts clearly and formulate the subject matter of a given problem, (2 ) students
are less critical (LCTA-1), students can identify the facts in problem, less appropriate in revealing
prerequisite(concept / theorem / data), and solve problems based on the concept-theorem which is not
appropriate, (3) critical student (LCTA -2), students can identify the fact in problem, revealing the
prerequisite knowledge appropriately, can solve the problem but still less accurate in every stage