Abacus Lesson -ADD and SUB- 4+
ADD and SUB using Abacus
Hirokazu Komatsu
Designed for iPad
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- 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
It works well. I like it
I had an itch to practice abacus after watching some Asian dramas. I remember learning it in elementary school but I completely forgot how to do it. This is the Japanese Abacus with 1 bead on top and I think I originally learned the Chinese Abacus with two beads in top. Despite a few misspelled words in the instructions, I think the instructions are easy to follow and the practice exercises are straightforward forward. I am not a math person, but there is something kind of soothing about calculating with an abacus. I like the sound too. I recommend.
Awsome
I love the app, just wanted to let you know that there is an error on the summary on lesson 3, in the addition part.
Thanks
Quick to learn
I learned basic addition and subtraction quickly. I’m just on lesson four, but the simple explanations are very helpful. Five stars if I were able to use if in landscape view.
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, for example, based on the features you use or your age. Learn More
Information
- Seller
- Hirokazu Komatsu
- Size
- 144.5 MB
- Category
- Education
- Compatibility
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- iPhone
- Requires iOS 11.0 or later.
- iPad
- Requires iPadOS 11.0 or later.
- iPod touch
- Requires iOS 11.0 or later.
- Mac
- Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- Apple Vision
- Requires visionOS 1.0 or later.
- Languages
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English, Japanese
- Age Rating
- 4+
- Copyright
- © 2020 Hirokuma.App
- Price
- Free
- In-App Purchases
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- Donation Lv1 for hiding Ad $1.99
- Donation Lv2 for hiding Ad $3.99
- Donation Lv3 for hiding Ad $8.99