These Montessori command cards are for practicing independent work in math using the small bead frame. It is recommended that forming quantities, static and dynamic addition, and static subtraction on the small bead frame be mastered before attempting dynamic subtraction. The recommended pre-requisite command cards can be found here: Forming and Reading Numbers on the Small Bead FrameStatic Addition on the Small Bead FrameDynamic Addition on the Small Bead FrameStatic Subtraction on the Small Be