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Mirrors > Home > ILE Home > Th. List > 8p2e10 | GIF version |
Description: 8 + 2 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.) |
Ref | Expression |
---|---|
8p2e10 | ⊢ (8 + 2) = ;10 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-2 8481 | . . . 4 ⊢ 2 = (1 + 1) | |
2 | 1 | oveq2i 5663 | . . 3 ⊢ (8 + 2) = (8 + (1 + 1)) |
3 | 8cn 8508 | . . . 4 ⊢ 8 ∈ ℂ | |
4 | ax-1cn 7438 | . . . 4 ⊢ 1 ∈ ℂ | |
5 | 3, 4, 4 | addassi 7496 | . . 3 ⊢ ((8 + 1) + 1) = (8 + (1 + 1)) |
6 | 2, 5 | eqtr4i 2111 | . 2 ⊢ (8 + 2) = ((8 + 1) + 1) |
7 | df-9 8488 | . . 3 ⊢ 9 = (8 + 1) | |
8 | 7 | oveq1i 5662 | . 2 ⊢ (9 + 1) = ((8 + 1) + 1) |
9 | 9p1e10 8879 | . 2 ⊢ (9 + 1) = ;10 | |
10 | 6, 8, 9 | 3eqtr2i 2114 | 1 ⊢ (8 + 2) = ;10 |
Colors of variables: wff set class |
Syntax hints: = wceq 1289 (class class class)co 5652 0cc0 7350 1c1 7351 + caddc 7353 2c2 8473 8c8 8479 9c9 8480 ;cdc 8877 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 665 ax-5 1381 ax-7 1382 ax-gen 1383 ax-ie1 1427 ax-ie2 1428 ax-8 1440 ax-10 1441 ax-11 1442 ax-i12 1443 ax-bndl 1444 ax-4 1445 ax-17 1464 ax-i9 1468 ax-ial 1472 ax-i5r 1473 ax-ext 2070 ax-sep 3957 ax-cnex 7436 ax-resscn 7437 ax-1cn 7438 ax-1re 7439 ax-icn 7440 ax-addcl 7441 ax-addrcl 7442 ax-mulcl 7443 ax-mulcom 7446 ax-addass 7447 ax-mulass 7448 ax-distr 7449 ax-1rid 7452 ax-0id 7453 ax-cnre 7456 |
This theorem depends on definitions: df-bi 115 df-3an 926 df-tru 1292 df-nf 1395 df-sb 1693 df-clab 2075 df-cleq 2081 df-clel 2084 df-nfc 2217 df-ral 2364 df-rex 2365 df-rab 2368 df-v 2621 df-un 3003 df-in 3005 df-ss 3012 df-sn 3452 df-pr 3453 df-op 3455 df-uni 3654 df-int 3689 df-br 3846 df-iota 4980 df-fv 5023 df-ov 5655 df-inn 8423 df-2 8481 df-3 8482 df-4 8483 df-5 8484 df-6 8485 df-7 8486 df-8 8487 df-9 8488 df-dec 8878 |
This theorem is referenced by: 8p3e11 8957 8t5e40 8994 |
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