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Theorem 1p2e3 9206
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 9142 . 2  |-  2  e.  CC
2 ax-1cn 8053 . 2  |-  1  e.  CC
3 2p1e3 9205 . 2  |-  ( 2  +  1 )  =  3
41, 2, 3addcomli 8252 1  |-  ( 1  +  2 )  =  3
Colors of variables: wff set class
Syntax hints:    = wceq 1373  (class class class)co 5967   1c1 7961    + caddc 7963   2c2 9122   3c3 9123
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 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-11 1530  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-ext 2189  ax-resscn 8052  ax-1cn 8053  ax-1re 8054  ax-addrcl 8057  ax-addcom 8060
This theorem depends on definitions:  df-bi 117  df-nf 1485  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-in 3180  df-ss 3187  df-2 9130  df-3 9131
This theorem is referenced by:  binom3  10839  3lcm2e6woprm  12523  2exp16  12875  1kp2ke3k  15860
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