Official Digital Abacus • 15 Rods Standard
Digital Soroban Bead Frame
Authentic Japanese Soroban with 1 Upper Heaven bead (value 5) and 4 Lower Earth beads (value 1 each). Rod 8 with the White Dot marks the Unit place.
15 RODS SOROBAN • 1:4 BEAD SYSTEM
Device View:
Rods 1 to 7 (Left of Center)Addition • Subtraction • Multiplication
From Center towards Left: Tens (10s), Hundreds (100s), Thousands (1000s), Lakhs, Crores.
⭐
Rod 8: Center Dot
UNIT PLACE (1s)
Rods 9 to 15 (Right)Decimals • Divisions
From Center towards Right: Tenths (0.1), Hundredths (0.01), Thousandths.
🧮
15-Rod Soroban ReadingCenter Dot = Unit Place
7
Quick Set:
ABACUS 'D' MATHS ACADEMY15 RODS
Touch / Click Beads
◀ WHOLE NUMBERS (+, −, ×)
⭐ 1s
DECIMALS (➗) ▶
10-Cr10Cr
CroresCr
10-Lakh10L
LakhsL
10-Th10K
ThousTh
Tens10s
Units1s
0.10.1
0.01.01
0.001m
10⁻⁴4d
10⁻⁵5d
10⁻⁶6d
10⁻⁷7d
0
R1
0
R2
0
R3
0
R4
0
R5
0
R6
0
R7
7
R8
0
R9
0
R10
0
R11
0
R12
0
R13
0
R14
0
R15
FRAME: ADMA-15ROD-STANDARD
1 UPPER (5) + 4 LOWER (1)
CENTER: ROD 8 (1s)
How Beads Represent Values:
• Counting Beads: Beads only add value when pushed towards the reckoning beam divider in the center.
• Upper Heaven Bead (value 5): Push down towards the beam to activate (+5). Push up to deactivate (0).
• Lower Earth Beads (value 1 each): Push up towards the beam to activate (+1 each, up to 4).
• Forming 7: 1 Heaven bead down (+5) and 2 Earth beads up (+2) on the same rod.
Want to see how complex multi-digit calculations are solved step-by-step with formulas?Open Step-by-Step Sum Explainer