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Metamath Proof Explorer

Theorem 8p8e16

Description: 8 + 8 = 16. (Contributed by Mario Carneiro, 19-Apr-2015)

		Ref	Expression
	Assertion	8p8e16	$⊢ 8 + 8 = 16$

Step	Hyp	Ref	Expression
1		8nn0	$⊢ 8 \in ℕ_{0}$
2		7nn0	$⊢ 7 \in ℕ_{0}$
3		5nn0	$⊢ 5 \in ℕ_{0}$
4		df-8	$⊢ 8 = 7 + 1$
5		df-6	$⊢ 6 = 5 + 1$
6		8p7e15	$⊢ 8 + 7 = 15$
7	1 2 3 4 5 6	6p5lem	$⊢ 8 + 8 = 16$