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Soroban Tutorial - Big Friends & Family Soroban Tutorial - Big Friends & Family Learn double-digit operations with Big Friends and Family combinations! Page 1 of 7 Step 1: Introduction Welcome! We'll cover: Big Friends (pairs to 10) for addition and subtraction Family Combinations (mixing big and little friends) Double-digit practice with tens and units Step 2: Big Friends Addition Total Value: 0 Big Friends : Pairs to 10 9+1, 8+2, 7+3, 6+4, 5+5 Addition : 9=10-1, 8=10-2, 7=10-3, 6=10-4, 5=10-5 Example: 26 + 9 1. Set 26 2. Add 10 (36), subtract 1 (35) Total = 35 Try adding with big friends! Step 3: Big Friends Subtraction Total...

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Soroban Learning Tutorial - Level 2 Soroban Learning Tutorial - Level 2 Learn addition, subtraction, and little friends with the Soroban! Page 1 of 5 Step 1: Introduction to Level 2 Welcome to Level 2! We'll learn: How to add and subtract on the Soroban What "little friends" are Practice with a test We'll continue using a single Units column. Step 2: Addition Units Total: 0 In words: Zero Example: 3 + 2 1. Set 3 (3 Earth beads) 2. Add 2 (click 2 more Earth beads up) Total = 5 Try adding numbers yourself! ...