Practice Makes Automatic

With daily practice, mental addition gets noticeably faster within a few weeks. The brain gradually shifts the work from the slow, effortful prefrontal cortex toward faster automatic circuits — the same kind of shift that lets trained musicians sight-read a score without conscious effort.

One more reason to drill daily: spacing matters more than total time. Five minutes every day rewires the arithmetic pathway faster than one long weekly session, because each short rep reactivates and strengthens the same circuits. Keep it varied — chain a few sums in your head whenever you have a spare moment, and the confidence compounds.