Opening the iTunes Store.If iTunes doesn’t open, click the iTunes icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator
iTunes

## iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app Abacus for Kids by LogyCat, get iTunes now.

Do you already have iTunes? Click I Have iTunes to open it now.

iTunes for Mac + PC

# Abacus for Kids

## By LogyCat

#### Description

The abacus, also called a counting frame, is a calculating tool used primarily in parts of Asia for performing arithmetic processes. The abacus was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere. Around the world, abaci have been used in pre-schools and elementary schools as an aid in teaching the numeral system and arithmetic.

This application includes:
1. the Basic Training
1.1. Addition and subtraction of the const 37: add 37 for 3 times to get 111, and another 3 times to get 222, and so on. When the data is 999, continue to subtract 37 from it until it reaches 0.
1.2. Addition and subtraction of the const 185: add 185 for 6 times to get 1110, and another 6 times to get 2220, and so on. When the data is 9990, continue to subtract 185 from it until it reaches 0.
1.3. Addition and subtraction of the const 625: add 625 for 16 times to get 10000, and another 16 times to get 20000, and so on. When the data is 62500, continue to subtract 625 from it until it reaches 0.
1.4. Addition and subtraction of the const 16835: add 16835 for 3 times to get 50505, and another 3 times to get 101010, and so on. When the data is 1010100, continue to subtract 16835 from it until it reaches 0.
1.5. There're other consts such as 16875 and 123456789.
1.6. 100: add 1, 2, 3, …, 99 and 100 to get 5050 and then subtract 1, 2, 3, …, 99 and 100 to get 0.

2. Abacus formulas
The application will show abacus formulas to help the user after the user has beaded in the first number. The right-bottom can be pressed to toggle the hint. Abacus formulas include the Addition Tables and the Subtraction Tables can be referenced at: http://www.tux.org/~bagleyd/AbacusLee.html

3. Abacus Tests
The user can select Easy or Difficult tests. In the Easy mode, there are 2 or 3 digits in each number, and 4 or 5 in Difficult mode. When the user reaches the right answer, the next question will be automatically displayed.

Support IOS 9.1

## Customers Also Bought

View in iTunes
This app is designed for both iPhone and iPad
• Free
• Category: Education
• Updated:
• Version: 7.2
• Size: 11.0 MB
• Languages: English, Catalan, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hungarian, Indonesian, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Traditional Chinese, Turkish
• Developer:

Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

#### Customer Ratings

We have not received enough ratings to display an average for the current version of this application.