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- Mental Multiplication Tricks
- iOS Apps: Education By: Alexander Mokrushin
- $0.99
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 1 + 5 Version: 3.0 Using this app you will learn to do some multiplying of small numbers (till 12) without using the multiplication tables. This app presents only a part of the Trachtenberg system - a ...