Do I need to sign up or download anything?

No sign-up or download required. It runs in your browser, ready to use.

Does it work on phones and tablets?

Yes. It works smoothly on mobile, tablet, and desktop devices.

English and Chinese are supported. Language is auto-detected and can be switched manually.

Make math practice fun: from counting to carrying/borrowing

Adaptive difficulty and instant feedback help kids build mental math skills step by step. Bilingual (EN/ZH). Works great on phones and desktops.

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Adjusts questions based on accuracy and streaks.

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Celebrate correct answers and get gentle prompts on mistakes.

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English and Chinese UI with automatic detection.

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Unified touch, mouse, and keyboard input on all devices.

Designed for effective early math learning:

Adaptive & Personalized Difficulty adjusts dynamically for the right challenge level
Gentle Feedback Positive animations and sounds encourage learning
Bilingual English/Chinese UI with seamless switching
Low-end Friendly Automatically tones down effects for smooth performance
No Sign-up Open and start practicing immediately

Start practicing in four simple steps:

Read the problem Understand the counting/addition/subtraction question
Enter digits Use the on-screen keypad or your keyboard
Auto navigation The cursor moves to higher places; auto-check when complete
Get feedback Celebrate success and move to the next question as difficulty adapts

A gradual, kid-friendly progression:

Counting 1–9 Recognize quantities and match numbers
1-digit addition/subtraction No carrying/borrowing
2-digit addition/subtraction Introduce carrying/borrowing
Mixed operations and 3-digit Advanced carry/borrow and readiness for negatives

Pick a focus area: