Anzan19x19 — ASO

By Hajime Hotaka on AppTrack Ninja.

Simple anzan

Method of mental calculation of 19x19 Provides a completely new mental method of multiplication from 11 to 19 This method can be understood in a few minutes and can be calculated on the fly.Provides a new mental calculation method of multiplication from 11 to 19.

Categories: Education, Entertainment

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Anzan19x19 — ASO | AppTrack Ninja