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Theorem 8p2e10 9680
Description: 8 + 2 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
Assertion
Ref Expression
8p2e10 (8 + 2) = 10

Proof of Theorem 8p2e10
StepHypRef Expression
1 df-2 9192 . . . 4 2 = (1 + 1)
21oveq2i 6024 . . 3 (8 + 2) = (8 + (1 + 1))
3 8cn 9219 . . . 4 8 ∈ ℂ
4 ax-1cn 8115 . . . 4 1 ∈ ℂ
53, 4, 4addassi 8177 . . 3 ((8 + 1) + 1) = (8 + (1 + 1))
62, 5eqtr4i 2253 . 2 (8 + 2) = ((8 + 1) + 1)
7 df-9 9199 . . 3 9 = (8 + 1)
87oveq1i 6023 . 2 (9 + 1) = ((8 + 1) + 1)
9 9p1e10 9603 . 2 (9 + 1) = 10
106, 8, 93eqtr2i 2256 1 (8 + 2) = 10
Colors of variables: wff set class
Syntax hints:   = wceq 1395  (class class class)co 6013  0cc0 8022  1c1 8023   + caddc 8025  2c2 9184  8c8 9190  9c9 9191  cdc 9601
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-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211  ax-sep 4205  ax-cnex 8113  ax-resscn 8114  ax-1cn 8115  ax-1re 8116  ax-icn 8117  ax-addcl 8118  ax-addrcl 8119  ax-mulcl 8120  ax-mulcom 8123  ax-addass 8124  ax-mulass 8125  ax-distr 8126  ax-1rid 8129  ax-0id 8130  ax-cnre 8133
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2802  df-un 3202  df-in 3204  df-ss 3211  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-int 3927  df-br 4087  df-iota 5284  df-fv 5332  df-ov 6016  df-inn 9134  df-2 9192  df-3 9193  df-4 9194  df-5 9195  df-6 9196  df-7 9197  df-8 9198  df-9 9199  df-dec 9602
This theorem is referenced by:  8p3e11  9681  8t5e40  9718
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