The human brain is functionally divided into 2 sides/hemispheres the logical side and visual side. The left/logical side of the brain governs different functions related to number, text, sequencing, formula, and analytical interpretation, whereas the right/visual side of brain governs functions like face recognition, spatial memory, power of estimation and comparison, processing of tunes/ music etc. In the UCMAS program children are trained on arithmetic operations and formulas which are stored in their logical side of the brain, and while doing mental math, they convert the logical numerical representation of numbers into bead images utilizing their visual side of the brain and retrieving formulas which are stored in their logical brain, thus developing both the logical and creative functions of the brain simultaneously.
The brain carefully balances and assigns control of certain functions to each side. It’s all nature’s way of ensuring that the brain ultimately splits up tasks to maximize efficiency.