Interactive Step Explainer • Visual Tutor
Abacus Step-by-Step Sum Explainer
Type any arithmetic calculation or select a competition sum to watch the exact bead movements and formula breakdown.
Quick Examples:
=
Expression & Final Result
46 + 89 = 135
Step 1 of 3
#1
Step 1: Set Initial Number (46) on Frame
Action Summary
Position 46 across the abacus rods ending at Center Unit Rod (Rod 8)
Target Place: From Tens Rod to Units Rod
Formula / Rule
Setup Initial Number
Subtotal after this step: 46
👉 Finger Technique
Use Right Hand (Thumb for lower beads, Index finger for upper 5 bead) to set initial value.
Teacher Explanation: Begin by setting 46 on the Soroban. Each digit is placed on its designated rod from left to right, with the last digit on the Center Dot (Rod 8 = Unit Place).
SOROBAN VISUAL STATE (STEP 1)
0
10M
0
1M
0
100K
0
10K
0
1K
0
100
4
10
6
1s⭐
0
.1
0
.01
0
m
0
-4
0
-5
0
-6
0
-7
ACTIVE RODS HIGHLIGHTED IN AMBER GLOW
ROD 8 = UNIT PLACE
Formulas Applied In This Calculation (2):
+8 = +10 - 2+9 = +10 - 5 + 4