Associative
Add 6 Numbers

Proof: Associative

Let's prove the following theorem:

a + (b + c) = (a + b) + c

Proof:

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Proof Table
# Claim Reason
1 (a + b) + c = a + (b + c) (a + b) + c = a + (b + c)
2 a + (b + c) = (a + b) + c if (a + b) + c = a + (b + c), then a + (b + c) = (a + b) + c
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