Theorem 6re

Description: The number 6 is real. (Contributed by NM, 27-May-1999)

	Ref	Expression
Assertion	6re	$$⊢6\in ℝ$$

Proof

Step	Hyp	Ref	Expression
1		df-6	$$⊢6=5+1$$
2		5re	$$⊢5\in ℝ$$
3		1re	$$⊢1\in ℝ$$
4	2 3	readdcli	$$⊢5+1\in ℝ$$
5	1 4	eqeltri	$$⊢6\in ℝ$$