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| Mirrors > Home > ILE Home > Th. List > 9p1e10 | GIF version | ||
| Description: 9 + 1 = 10. (Contributed by Mario Carneiro, 18-Apr-2015.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 1-Aug-2021.) |
| Ref | Expression |
|---|---|
| 9p1e10 | ⊢ (9 + 1) = ;10 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-dec 9783 | . 2 ⊢ ;10 = (((9 + 1) · 1) + 0) | |
| 2 | 9nn 9478 | . . . . . 6 ⊢ 9 ∈ ℕ | |
| 3 | 1nn 9318 | . . . . . 6 ⊢ 1 ∈ ℕ | |
| 4 | nnaddcl 9327 | . . . . . 6 ⊢ ((9 ∈ ℕ ∧ 1 ∈ ℕ) → (9 + 1) ∈ ℕ) | |
| 5 | 2, 3, 4 | mp2an 430 | . . . . 5 ⊢ (9 + 1) ∈ ℕ |
| 6 | 5 | nncni 9317 | . . . 4 ⊢ (9 + 1) ∈ ℂ |
| 7 | 6 | mulridi 8329 | . . 3 ⊢ ((9 + 1) · 1) = (9 + 1) |
| 8 | 7 | oveq1i 6095 | . 2 ⊢ (((9 + 1) · 1) + 0) = ((9 + 1) + 0) |
| 9 | 6 | addridi 8470 | . 2 ⊢ ((9 + 1) + 0) = (9 + 1) |
| 10 | 1, 8, 9 | 3eqtrri 2264 | 1 ⊢ (9 + 1) = ;10 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 ∈ wcel 2209 (class class class)co 6085 0cc0 8180 1c1 8181 + caddc 8183 · cmul 8185 ℕcn 9307 9c9 9365 ;cdc 9782 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4249 ax-cnex 8271 ax-resscn 8272 ax-1cn 8273 ax-1re 8274 ax-icn 8275 ax-addcl 8276 ax-addrcl 8277 ax-mulcl 8278 ax-mulcom 8281 ax-addass 8282 ax-mulass 8283 ax-distr 8284 ax-1rid 8287 ax-0id 8288 ax-cnre 8291 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-iota 5337 df-fv 5385 df-ov 6088 df-inn 9308 df-2 9366 df-3 9367 df-4 9368 df-5 9369 df-6 9370 df-7 9371 df-8 9372 df-9 9373 df-dec 9783 |
| This theorem is used by: dfdec10 9785 10nn 9801 le9lt10 9813 decsucc 9827 5p5e10 9857 6p4e10 9858 7p3e10 9861 8p2e10 9866 9p2e11 9873 10m1e9 9882 9lt10 9917 sq10e99m1 11167 3dvds 12650 3dvdsdec 12651 3dvds2dec 12652 1259lem2 13266 1259lem3 13267 1259lem4 13268 bposlem4 16275 bposlem5 16276 |
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