## 📚 Master the Soroban Abacus

Complete visual guide to reading and understanding Japanese abacus patterns

### 1Understanding the Structure

The soroban has heaven beads (top) and earth beads (bottom) separated by a horizontal bar.

- Heaven bead: Worth 5 units
- Earth beads: Worth 1 unit each
- Active position: Beads pushed toward the bar

Zero (0) - All beads away from bar

### 2Reading Single Digits (1-9)

1 = One earth bead up
3 = Three earth beads up
5 = Heaven bead down
7 = Heaven bead + 2 earth beads
9 = Heaven bead + 4 earth beads

### 3Multi-Digit Numbers

Each column represents a place value. Read from right to left: ones, tens, hundreds, thousands.

23 = 2 tens + 3 ones
Tens: 2 | Ones: 3
67 = 6 tens + 7 ones
Tens: 6 | Ones: 7
158 = 1 hundred + 5 tens + 8 ones
Hundreds: 1 | Tens: 5 | Ones: 8

### 4Practice Strategy

#### Start Simple, Build Complexity

1. Master single digits (0-9) first
2. Practice two-digit numbers (10-99)
3. Advance to three-digit numbers (100-999)
4. Challenge yourself with larger numbers

#### Reading Strategy

For each column, count the active beads:

- Heaven bead down = add 5
- Earth beads up = add 1 each
- Total the values for each column

Practice Number
Try to read this number before revealing!

## ⚙️ Current Configuration

Settings used for this flashcard set

Cards: 11
Range: 10 - 20
Color Scheme: All beads are the same color
Bead Shape: Diamond

### Configuration Details:

This flashcard set has been generated with specific settings to help you practice. You can generate new sets with different ranges, color schemes, and visual styles using the command-line tools.

#### Available Options:

- Number Ranges: Practice with any range from 0-99999
- Color Schemes: Monochrome, place-value, heaven-earth, alternating
- Bead Shapes: Diamond, circle, square
- Visual Styles: Multiple colorblind-friendly palettes

## 🎯 Interactive Challenges

Test your soroban skills with engaging games and quizzes

### 🧠 Memory & Speed

### 🎲 Logic & Patterns

## Speed Memory Quiz

Test your soroban reading skills! Cards will be shown briefly, then you'll enter the numbers you remember.

Cards to Quiz:
Display Time per Card:
2.0s
Card 1 of 10
Get Ready...

### Enter the Numbers You Remember

Cards shown: 0
Guesses left: 0
Found: 0
Type the numbers you remember:

### Quiz Results

0%

Score: 0 / 0 correct

Time per card: 2.0s

#### Detailed Results:

## Card Sorting Challenge

Click cards and positions to arrange them in ascending order (smallest to largest). No numerals shown - rely on reading the abacus!

Cards to Sort:
Ready to start
0:00

Instructions: Click a card → Click position or + button to place. Click placed cards to move back.

#### Available Cards

#### Sorting Positions (Smallest → Largest)

### 🎯 Sorting Challenge Results

## Matching Pairs Challenge

Match abacus patterns with their corresponding numerals. Find all pairs in minimum moves!

Game Mode:
Turn Timer:
Choose Grid Size to Start:
Ready to start
Moves: 0 Pairs: 0/0
0:00
🔵 Player 1 0 pairs
🔵 Player 1's Turn
30s
🟠 Player 2 0 pairs

Instructions: Click two cards to flip them. Purple cards (🧮) contain abacus patterns, green cards (🔢) contain numbers. Match abacus patterns with their corresponding numbers. Complete all pairs with minimum moves!

### 🧩 Matching Pairs Results

## 🧮 Practice Flashcards

Interactive cards for hands-on learning

#1
10
#2
11
#3
12
#4
13
#5
14
#6
15
#7
16
#8
17
#9
18
#10
19
#11
20

Interactive flashcards for digital learning. Use the left/right arrow keys or click the cards to flip them.