Core formulas
Core column and speed exercises for addition and subtraction.
About Sorobak
Learn, play, and grow
Sorobak combines arithmetic exercises, brain games, and creative activities to help children learn, discover new things, and develop their skills.
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Mental arithmetic
Addition, subtraction, multiplication, and division at different levels.
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Brain training
Games to practise memory, attention, and logical thinking.
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Creative play
Turn coordinates into drawings and explore numbers with the abacus.
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Progress you can see
Your results, training history, and points, all in one place.
How it works
Get started in four simple steps
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Register an account
Enter the student details and verify the email address.
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Contact us
Online payment is not available yet. Our team will help activate monthly access.
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Choose a training activity
Open an arithmetic trainer or brain-training game and configure its available settings.
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Track the results
After individual arithmetic sessions, review points, history, and ranking.
Learning program
Exercises from core foundations to mixed formulas
The column and speed trainers include four formula modes and levels from one to four digits. Multiplication and division trainers let you choose the number ranges separately.
Friends of 5
A dedicated mode for column and speed training with five formulas.
Friends of 10
A dedicated mode for column and speed training with ten formulas.
Mixed formulas
Combined exercises for working with different formulas.
Multiplication and division
Multiplication with a two- to four-digit first number, and division with a three- to five-digit dividend and configurable second number.
Simple pricing
Choose the right plan for you
Start with free tools, unlock individual training, or bring Sorobak to your school or learning centre.
Free
$0
Always free
Start with the public tools. No subscription is needed.
- Online abacus
- Visual flashcards
- Abacus lessons and educational articles
- Addition PDF worksheets
Individual
$8
USD / student / month
Full training for one student.
- Everything in Free
- Four arithmetic trainers with saved settings
- Nine brain games plus Calculation + Memory
- Coordinate drawing: all 90 drawings
- Seven levels of Olympiad practice
- Subtraction, mixed, and soroban PDFs
- Arithmetic results, history, and rankings
Schools & centres
Manage your school’s student access in one place. See pricing and choose your student places on the subscription page.
- All Individual plan activities
- Administrator panel with paid places and expiry dates
- Generate student logins to share with children
Choose individual monthly or yearly access, or a monthly school package with student places.
+374 77 166 268Frequently asked questions
Answers before you get started
Everything you need to know before taking the first step.
What does the Sorobak subscription include?
The subscription includes four arithmetic trainers, nine brain games, Calculation + Memory, all 90 coordinate drawings, seven Olympiad levels, paid worksheet PDFs, and arithmetic progress tracking.
How can I subscribe?
Create an account and verify the email address, then email [email protected] or call +374 77 166 268. Online payment is not available yet.
Which languages are available?
Choose the interface language using the selector at the top of the page.
How is student progress displayed?
Individual arithmetic training results show total and category points, weekly and monthly activity, a seven-day chart, history, and ranking position.
Do I need an account for the Olympiad tests?
Free Olympiad variants per day: 10. Premium provides unlimited practice across all seven levels.
Can I use Sorobak on a phone or tablet?
Yes. The platform pages adapt to desktop, tablet, and modern mobile screens.
Does the Sorobak flashcard trainer cost anything?
No. The visual flashcard trainer is free forever. Guests can practise without registering, while registered users can save their private results.
Still have a question?
Contact us