Ninth graders investigate divisibility rules.  In this middle school mathematics/Algebra I instructional activity, 9th graders explore the divisibility rules of 7, 11, and 13.  Students examine certain six-digit numbers that...

Students find the greatest common factor of two numbers. In this algebra instructional activity, students use prime factorization to find their factor to simplify equations. they create a factor tree to find the factors of composite...