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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 9757 | . 2 ⊢ ;10 = (((9 + 1) · 1) + 0) | |
| 2 | 9nn 9452 | . . . . . 6 ⊢ 9 ∈ ℕ | |
| 3 | 1nn 9294 | . . . . . 6 ⊢ 1 ∈ ℕ | |
| 4 | nnaddcl 9303 | . . . . . 6 ⊢ ((9 ∈ ℕ ∧ 1 ∈ ℕ) → (9 + 1) ∈ ℕ) | |
| 5 | 2, 3, 4 | mp2an 430 | . . . . 5 ⊢ (9 + 1) ∈ ℕ |
| 6 | 5 | nncni 9293 | . . . 4 ⊢ (9 + 1) ∈ ℂ |
| 7 | 6 | mulridi 8318 | . . 3 ⊢ ((9 + 1) · 1) = (9 + 1) |
| 8 | 7 | oveq1i 6085 | . 2 ⊢ (((9 + 1) · 1) + 0) = ((9 + 1) + 0) |
| 9 | 6 | addridi 8458 | . 2 ⊢ ((9 + 1) + 0) = (9 + 1) |
| 10 | 1, 8, 9 | 3eqtrri 2264 | 1 ⊢ (9 + 1) = ;10 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 ∈ wcel 2209 (class class class)co 6075 0cc0 8169 1c1 8170 + caddc 8172 · cmul 8174 ℕcn 9283 9c9 9341 ;cdc 9756 |
| 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 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 4244 ax-cnex 8260 ax-resscn 8261 ax-1cn 8262 ax-1re 8263 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-mulcom 8270 ax-addass 8271 ax-mulass 8272 ax-distr 8273 ax-1rid 8276 ax-0id 8277 ax-cnre 8280 |
| This theorem 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 3711 df-pr 3712 df-op 3714 df-uni 3931 df-int 3966 df-br 4126 df-iota 5332 df-fv 5380 df-ov 6078 df-inn 9284 df-2 9342 df-3 9343 df-4 9344 df-5 9345 df-6 9346 df-7 9347 df-8 9348 df-9 9349 df-dec 9757 |
| This theorem is referenced by: dfdec10 9759 10nn 9771 le9lt10 9782 decsucc 9796 5p5e10 9826 6p4e10 9827 7p3e10 9830 8p2e10 9835 9p2e11 9842 10m1e9 9851 9lt10 9886 sq10e99m1 11129 3dvds 12609 3dvdsdec 12610 3dvds2dec 12611 |
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