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Theorem 1p2e3 9337
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 9273 . 2  |-  2  e.  CC
2 ax-1cn 8185 . 2  |-  1  e.  CC
3 2p1e3 9336 . 2  |-  ( 2  +  1 )  =  3
41, 2, 3addcomli 8383 1  |-  ( 1  +  2 )  =  3
Colors of variables: wff set class
Syntax hints:    = wceq 1398  (class class class)co 6028   1c1 8093    + caddc 8095   2c2 9253   3c3 9254
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 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-11 1555  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213  ax-resscn 8184  ax-1cn 8185  ax-1re 8186  ax-addrcl 8189  ax-addcom 8192
This theorem depends on definitions:  df-bi 117  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-in 3207  df-ss 3214  df-2 9261  df-3 9262
This theorem is referenced by:  binom3  10982  3lcm2e6woprm  12738  2exp16  13090  1kp2ke3k  16438
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