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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 8559 | . 2 ⊢ ;10 = (((9 + 1) · 1) + 0) | |
2 | 9nn 8267 | . . . . . 6 ⊢ 9 ∈ ℕ | |
3 | 1nn 8117 | . . . . . 6 ⊢ 1 ∈ ℕ | |
4 | nnaddcl 8126 | . . . . . 6 ⊢ ((9 ∈ ℕ ∧ 1 ∈ ℕ) → (9 + 1) ∈ ℕ) | |
5 | 2, 3, 4 | mp2an 417 | . . . . 5 ⊢ (9 + 1) ∈ ℕ |
6 | 5 | nncni 8116 | . . . 4 ⊢ (9 + 1) ∈ ℂ |
7 | 6 | mulid1i 7183 | . . 3 ⊢ ((9 + 1) · 1) = (9 + 1) |
8 | 7 | oveq1i 5553 | . 2 ⊢ (((9 + 1) · 1) + 0) = ((9 + 1) + 0) |
9 | 6 | addid1i 7317 | . 2 ⊢ ((9 + 1) + 0) = (9 + 1) |
10 | 1, 8, 9 | 3eqtrri 2107 | 1 ⊢ (9 + 1) = ;10 |
Colors of variables: wff set class |
Syntax hints: = wceq 1285 ∈ wcel 1434 (class class class)co 5543 0cc0 7043 1c1 7044 + caddc 7046 · cmul 7048 ℕcn 8106 9c9 8163 ;cdc 8558 |
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 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-sep 3904 ax-cnex 7129 ax-resscn 7130 ax-1cn 7131 ax-1re 7132 ax-icn 7133 ax-addcl 7134 ax-addrcl 7135 ax-mulcl 7136 ax-mulcom 7139 ax-addass 7140 ax-mulass 7141 ax-distr 7142 ax-1rid 7145 ax-0id 7146 ax-cnre 7149 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-nf 1391 df-sb 1687 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ral 2354 df-rex 2355 df-rab 2358 df-v 2604 df-un 2978 df-in 2980 df-ss 2987 df-sn 3412 df-pr 3413 df-op 3415 df-uni 3610 df-int 3645 df-br 3794 df-iota 4897 df-fv 4940 df-ov 5546 df-inn 8107 df-2 8165 df-3 8166 df-4 8167 df-5 8168 df-6 8169 df-7 8170 df-8 8171 df-9 8172 df-dec 8559 |
This theorem is referenced by: dfdec10 8561 10nn 8573 le9lt10 8584 decsucc 8598 5p5e10 8628 6p4e10 8629 7p3e10 8632 8p2e10 8637 9p2e11 8644 10m1e9 8653 9lt10 8688 sq10e99m1 9738 3dvdsdec 10409 3dvds2dec 10410 |
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