🧮 Abacus Simulator
Click or tap beads to move them — heaven bead slides down, earth beads slide up
Quiz Settings
🖐️ Which Finger to Use?
Hold your pencil with middle, ring & pinky fingers — keep thumb and pointer free to move beads.
🤙 Thumb pushes lower beads UP — for adding 1, 2, 3 & 4
+1
🔴
1 bead
+2
🔴🔴
2 beads
+3
🔴🔴�
3 beads
+4
🔴🔴🔴🔴
4 beads
☝️ Pointer — for adding upper bead (+5) and subtracting lower beads (−1 ~ −4)
+-5
↑
↓
🟡
upper bead
−4
↓
🔴🔴🔴🔴
4 beads down
−3
↓
🔴🔴🔴
3 beads down
−2
↓
🔴🔴
2 beads down
−1
↓
🔴
1 bead down
for adding and subtracting the upper bead "5" · for subtracting the lower beads "1 ~ 4"
💡
Tip:
Watch the
🤙 / ☝️
hint that appears when you click a bead — it shows which finger to use!
How to use the Abacus Simulator
🟡
Gold bead (top)
— click to slide DOWN to the bar = 5. Click again to slide back up = 0.
🔴
Red beads (bottom)
— click any bead to activate it and all beads above it. Click an active bead to
deactivate from there up.
👆
Use the
Set
button to jump to any number instantly. Try entering 12345 and clicking Set.
📊
Right column = ones, moving left = tens, hundreds, thousands, and so on up to 100
million.
⚪
White dot
on the beam =
ones (unit point)
. Gold dots mark thousands and millions — just like a real abacus.
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