Learning four operations (addition, subtraction, multiplication and division) are very easy now. You can easily learning four operations by 4 different hardness levels. (easy, hard, challange and 60 seconds) Also you can share your score in popular social platforms.
Four Operations is a free educational mobile app By Murat Dogan Coruh.It helps students practice the following standards .
Developer URL: NA
Software Version: 1.1
Release Date: 2015-02-20T02:56:21Z