Written by August 26, 2025
Abacus Math Program – Lesson 12 – The 5/10 Pair Combination Part 2
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Lesson 11 the 5/10 Pair Combination Part 1, we introduced the 5/10 pair combination for addition. Here in Lesson 12 Part 2 we will look at the 5/10 pair combination for subtraction. Just like in Lesson 11 Part 1 these examples will demonstrate how we use the 10 pair subtraction rule but instead of directly adding the