Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Know Abacus スクリーンショット

iPad

iPhone

About Know Abacus

Abacus is a wonderful mathematical instrument used for calculation. This app will help your children learn about Abacus, Numbers, Counting, Addition, and Subtraction. This is the first step to tap the unexploited potential in their brain and unleash their mathematical capability.

Suitable for children age 5 and up, who know about numbers and some basic addition and subtraction. For smaller children, recommend KnowNumber app.

* Counting with Abacus
* Addition/Subtraction 1 digit
* Addition/Subtraction 2 digits
* Multiplication 1-2 digits
* Division 1-2 digits
* Mental math
* Review lessons
* Unlimited random lessons
* Black/white or colorful abacus
* Learning modes
* Two-touch or multi-touch abacus
* Left-handed mode

Localized Languages:
* English, French, Spanish, Thai, Turkey, Arabic, Portuguese, and Russian