Chinvar Abacus Arena
A real soroban on screen: the top bead is worth 5 and each bottom bead is worth 1. Children move beads, read numbers and add flashing numbers in their head.
Free · no sign-up · no personal data · progress stays on your device.
- Show the number: move beads to make a target number
- Read the abacus: type the number the beads show
- Flash Anzan: numbers flash quickly — add them mentally
More rods are added automatically for higher classes.
FAQ
How do you show 7 on a soroban?
Bring down the top bead (5) and push up two bottom beads (1 + 1). 5 + 2 = 7.
At what age can kids start abacus?
Many children start around 4–5 years. Short daily practice of 10 minutes is enough to build number sense.