Written by August 12, 2025
Abacus Math Program – Lesson 10 – Five Pair Complement Part 2
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In Lesson 9 Five Pair Part 1 we examined the 5 pair addition rule. Here in Lesson 10 Part 2 we are going to examine the 5 pair subtraction rule. In review there are only two 5 pair complements to consider: 4-1 and 3-2. Let’s take a look at the 5 pair subtraction rule in some examples such as