Children's Abacus Mental Arithmetic (Beginner) (Beginner)

Author: Bao Jun
Publisher:
Publish Date: 2003-01-01
Features: Abacus mental arithmetic, also known as "abacus-style mental calculation" or "brain abacus fast calculation," in short, it is mental arithmetic using an abacus. It is a unique cognitive phenomenon in children and aligns with their cognitive development. Generally intelligent children can master this method through scientific training.