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Theorem 1p2e3 9277
Description: 1 + 2 = 3 (common case). (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
1p2e3 (1 + 2) = 3

Proof of Theorem 1p2e3
StepHypRef Expression
1 2cn 9213 . 2 2 ∈ ℂ
2 ax-1cn 8124 . 2 1 ∈ ℂ
3 2p1e3 9276 . 2 (2 + 1) = 3
41, 2, 3addcomli 8323 1 (1 + 2) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1397  (class class class)co 6017  1c1 8032   + caddc 8034  2c2 9193  3c3 9194
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-11 1554  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-addrcl 8128  ax-addcom 8131
This theorem depends on definitions:  df-bi 117  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-in 3206  df-ss 3213  df-2 9201  df-3 9202
This theorem is referenced by:  binom3  10918  3lcm2e6woprm  12657  2exp16  13009  1kp2ke3k  16320
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