Multiples Investigation The introduction and investigation of multiples provides a wonderful foundation for the understanding and internalization of number sense and number theory. These charts can be used either as part of the initial presentation of the concept and language of multiples alongside the colored bead bars of the decanomial box, or they could be used as a review activity. In this set you will find: -Pg. 1-4: Introductory Lesson Suggestions -Pg. 5-9: Investigation of Multiples tabl