Mental arithmetic is an essential skill in everyday life.

Are you looking for a Soroban training app to perform mental calculations, from the most basic to the most complex? This app meets your needs.

The Abacus Mental Calculation Trainer application for educational purposes, it is used for training for rapid mental arithmetic. It is highly recommended for any instructor and apprentice of the Soroban tool, it help you to:
• Practice mental arithmetic with the soroban tool.
• Make mental arithmetic an interesting and enjoyable game.
• Boost your child’s abilities and give him a good foundation in mental arithmetic.
• Improve concentration and memorization skills.
• Have fun with your child while developing numeracy skills.
• Master the basic arithmetic operations: addition and subtraction, with three levels of progressive difficulty.
• Become an expert in mental arithmetic.

From the launch of the application, and before starting the training,
You have to choose the settings that suit you.
Settings:
1: Number of digits:
This is the number of digits forming the numbers to operate, starting from 1 to 9.
2: Show delay:
This is the display time of the number, starts from 3 to 15, (3 = 3x100 = 300 milliseconds).
3: Clear delay:
This is the time to wait for the display of the next number, Starts from 3 to 15, (3 = 3x100 = 300 milliseconds).
4: Number of operations:
This is the number of operations to perform, Starts from 1 to 15.
5: Level
Represents the difficulty of the operations to perform, there are three levels (Simple, Complex 5, Complex 10)

What are the levels (Simple, Complex5, Complex10) ?
Simple level:
This is the simplest! For each digit, the operation requires only the activation of the beads (balls) of one column.
Complex 5 Level:
For each digit, the operation requires the activation and deactivation of the beads (balls) of one column.
Complex 10 level:
For each digit, the operation requires the activation and deactivation of two-column beads (balls).

Note:
Complex level 5 and Complex 10, sometimes they use the Simple level if necessary.
Enable or disable the subtraction operation.
Activate the keyboard to enter your answers, allowing the saving of the statistics of your skill.
Finally, to start the training, press the Start button…
At this stage, the training process begins, selecting random numbers…
If you want to go back to the settings page, press the Back key…
And good Learning :)