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Theorem 1p2e3 9268
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 9204 . 2 2 ∈ ℂ
2 ax-1cn 8115 . 2 1 ∈ ℂ
3 2p1e3 9267 . 2 (2 + 1) = 3
41, 2, 3addcomli 8314 1 (1 + 2) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1395  (class class class)co 6013  1c1 8023   + caddc 8025  2c2 9184  3c3 9185
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 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-11 1552  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211  ax-resscn 8114  ax-1cn 8115  ax-1re 8116  ax-addrcl 8119  ax-addcom 8122
This theorem depends on definitions:  df-bi 117  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-in 3204  df-ss 3211  df-2 9192  df-3 9193
This theorem is referenced by:  binom3  10909  3lcm2e6woprm  12648  2exp16  13000  1kp2ke3k  16256
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