-
- Mental Multiplication Tricks
- iOS Aplicații: Educaţie De: Alexander Mokrushin
- $0.99
- Liste: 0 + 0 Clasificări: 0 Recenzii: 0
- Punctele: 1 + 5 Versiune: 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 ...