Abacus Lesson -ADD and SUB‪-‬ 4+

ADD and SUB using Abacus

Hirokazu Komatsu

Designed for iPad

    • 5.0 • 4 Ratings
    • Free
    • Offers In-App Purchases

Screenshots

Description

This is an app that you can learn addition and subtraction using an abacus.

An abacus is named "Soroban" in Japan. Do you know what an abacus is? The abacus is very simple calculator used in China, Japan, Korea and so on. Some people may say "Isn't it an unnecessary tool if you have a calculator such as a smartphone?". Answer would be "No".

The biggest difference between electric calculators and the abacus is whether you need to hold it in your hand when calculating. Because of its simplicity, you will be able to easily use the abacus in your mind.

Imagine that you can use calculations of about 3 digits in your life without physical tools.

This app will give you the skill of calculation.

What’s New

Version 3.1.9

updated library.

Ratings and Reviews

5.0 out of 5
4 Ratings

4 Ratings

App Privacy

The developer, Hirokazu Komatsu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Location
  • Identifiers
  • Usage Data
  • Diagnostics

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Identifiers
  • Usage Data
  • Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary based on, for example, the features you use or your age. Learn More

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