BEAD-TO-NUMBER

What is Bead to Number?

Bead to Number (B2N) trains you to read a Japanese abacus (soroban) instantly. A bead pattern flashes on screen for a split second. You recognize the value and type the number — the same skill abacus students use when they move from physical beads to mental math.

How this trainer works

• Choose how many rods (1–5 digits) and flash speed (0.25–2.0 seconds).
• Press Start. Watch the beads flash, then enter the number on the keypad.
• Build streaks, track your speed, and sharpen recognition until reading beads feels automatic.

Why practice Bead to Number?

Fast bead reading is the foundation of visual mental math. The quicker you translate bead positions into numbers, the stronger your “mental abacus” becomes for addition, subtraction, and Flash Anzan.

Want to really learn mental math?

If you want to go beyond a single drill and truly learn mental math, SumoMath is a free program. Register at www.sumomath.com to get started with structured training, including anzan, flash practice, audibles, and soroban.

Related free tools

• Flash Anzan — add flashing numbers mentally and enter the total
• Number to Bead — see or hear a number, then set it on a soroban

Common questions

Is Bead to Number free on SumoMath? Yes. This tool is free in your browser — no download required.

What settings can I change? Rods (1–5 digits) and flash speed from 0.25 to 2.0 seconds.