Nintendo 3 ds Software Abacus, Anzan, Flash Mental Arithmetic Complete Version (Condition : Description, Condition : Difficult)

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

* This item is in the following condition.
・ Instruction manual Condition may be difficult (damaged, dirty, torn, broken, wet, sunburnt, writing, etc.).
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Flash mental arithmetic, which is currently a hot topic, was created for the practice of abacus mental arithmetic.
With the brush count method, calculations become difficult as the number increases from two to three digits. However, with abacus mental arithmetic, the brain captures numerical values as images, making it easy to perform calculations with many digits and calculations that require speed.
Abacus is originally an ancient Japanese learning tool that is ideal for developing the number sense (number sense). And as abacus improves, abacus mental arithmetic naturally develops.
The world's population of abacus is increasing. Let's enjoy Tomoe Flash Mental Arithmetic with friends from all over the world and improve your abacus skills!