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Theorem 8p2e10 9689
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 9201 . . . 4 2 = (1 + 1)
21oveq2i 6028 . . 3 (8 + 2) = (8 + (1 + 1))
3 8cn 9228 . . . 4 8 ∈ ℂ
4 ax-1cn 8124 . . . 4 1 ∈ ℂ
53, 4, 4addassi 8186 . . 3 ((8 + 1) + 1) = (8 + (1 + 1))
62, 5eqtr4i 2255 . 2 (8 + 2) = ((8 + 1) + 1)
7 df-9 9208 . . 3 9 = (8 + 1)
87oveq1i 6027 . 2 (9 + 1) = ((8 + 1) + 1)
9 9p1e10 9612 . 2 (9 + 1) = 10
106, 8, 93eqtr2i 2258 1 (8 + 2) = 10
Colors of variables: wff set class
Syntax hints:   = wceq 1397  (class class class)co 6017  0cc0 8031  1c1 8032   + caddc 8034  2c2 9193  8c8 9199  9c9 9200  cdc 9610
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213  ax-sep 4207  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-mulcom 8132  ax-addass 8133  ax-mulass 8134  ax-distr 8135  ax-1rid 8138  ax-0id 8139  ax-cnre 8142
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-iota 5286  df-fv 5334  df-ov 6020  df-inn 9143  df-2 9201  df-3 9202  df-4 9203  df-5 9204  df-6 9205  df-7 9206  df-8 9207  df-9 9208  df-dec 9611
This theorem is referenced by:  8p3e11  9690  8t5e40  9727
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