Ghost Mental Arithmetic
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The Ghost Mental Arithmetic is a new mental arithmetic method. It was developed by Kuniaki Iwanami, a doctor from Japan who graduated from the Faculty of Medicine, University of Tokyo. A series of 12 drill books are published by Shogakukan[1], and a handheld game console for learning this has been released by Takara Tomy Arts[2].
Features
The greatest feature of this method is to learn "mental arithmetic of 2-digit x 2-digit multiplication" in a very short period of 6 hours. In fact, in a Ghost Mental Arithmetic class held with Nichinoken, a tutoring school company in Japan, targeting third to fourth-grade elementary school students, all students were able to solve 2-digit x 2-digit arithmetic problems within 3 to 6 hours[3].
The method works for a wide range of mental calculations, including multiplication, division, fraction calculation, addition, and subtraction.
Related books
Shogakukan
- The Ghost Mental Arithmetic: Learn 2-Digit x 2-Digit Mental Arithmetic in 6 Hours
- The Ghost Mental Arithmetic: Learn 3-Digit x 2-Digit Mental Arithmetic in 6 Hours
- The Ghost Mental Arithmetic: Learn 2-Digit ÷ 2-Digit Mental Arithmetic in 6 Hours
- The Ghost Mental Arithmetic: Learn 3-Digit ÷ 2-Digit Mental Arithmetic in 6 Hours
- The Ghost Mental Arithmetic: Learn Fraction Mental Arithmetic in 6 Hours
- The Ghost Mental Arithmetic: Learn 2-Digit x 1-Digit Mental Arithmetic Print Introductory Edition
- The Ghost Mental Arithmetic: Learn 2-Digit x 1-Digit Mental Arithmetic Print
- The Ghost Mental Arithmetic: 2-Digit x 2-Digit Mental Arithmetic Print
- The Ghost Mental Arithmetic: Fish Board + 2-Digit x 1-Digit Mental Arithmetic Print
- The Ghost Mental Arithmetic: The Ghost Drawing Notebook
- The Ghost Mental Arithmetic: Business Edition 2-Digit x 2-Digit Mental Arithmetic
- Reiwa-era Edition The Ghost Mental Arithmetic: Learn 2-Digit x 2-Digit Mental Arithmetic in 6 Hours
Ghost Mental Arithmetic Special Classes
- Shogakukan Academy: The Ghost Mental Arithmetic Special Class (2-Digit x 1-Digit Mental Arithmetic)
- Nichinoken Tama Plaza School: The Ghost Mental Arithmetic Special Class (2-Digit x 2-Digit Mental Arithmetic)
- Nichinoken Mita School: The Ghost Mental Arithmetic Special Class (2-Digit x 1-Digit Mental Arithmetic)
- Nichinoken Center North School: The Ghost Mental Arithmetic Special Class (2-Digit x 1-Digit Mental Arithmetic)
- EDINA: The Ghost Mental Arithmetic Special Class (16 lessons in total) (Operated in collaboration with Meiko Network Japan)
Related toys & apps
- Kuniaki Iwanami Supervised Ghost Mental Arithmetic Trainer (White/Yellow) (Handheld game console, co-developed with Takara Tomy Arts)
- Ghost Mental Arithmetic Iwanami Mental Arithmetic 2-Digit Quick Learning (iOS Smartphone App, co-developed with Shogakukan)
Related articles
- "The Ghost Mental Arithmetic" Devised by a Medical Student of the University of Tokyo is Creating a Buzz! (President Inc.)[1]
References
- ↑ "Amazon webpage of The Ghost Mental Arithmetic book". Retrieved 2023-06-11.
- ↑ Takara Tomy Arts. "The Ghost Mental Arithmetic Trainer Webpage". Retrieved 2023-06-11.
- ↑ Satoshi Ohtake. ""The Ghost Mental Arithmetic" Devised by a Medical Student of the University of Tokyo is Creating a Buzz!". Retrieved 2023-06-11.
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