We offer Flash Cards. The basic function of Abacus Mental Arithmetic is to turn the numeric concepts from abstract into visible, touchable and moveable beads. When training this technique, Beads Interpretation is a process of turning the abstract numeric concept into beads, whilst Number Transformation is a process where beads image is transformed into number.Flash cards are pictorial representations of numbers set on the Abacus.The purpose of learning Abacus Mental Arithmetic is to evade the usage of abacus during the calculationreckoning process by simply interpreting the beads in mind. Beads visualization is instructed by the subconscious mind and gradually forms the Image Memory.Flash cards are used to ascertain the place value. Position of the beads indicates the place value.Every place value is an image.SpecificationsWeight :406 grams