Theorem 5re

Description: The number 5 is real. (Contributed by NM, 27-May-1999)

	Ref	Expression
Assertion	5re	|- 5 e. RR

Proof

Step	Hyp	Ref	Expression
1		df-5	|- 5 = ( 4 + 1 )
2		4re	|- 4 e. RR
3		1re	|- 1 e. RR
4	2 3	readdcli	|- ( 4 + 1 ) e. RR
5	1 4	eqeltri	|- 5 e. RR