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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 9710 | . 2 ⊢ ;10 = (((9 + 1) · 1) + 0) | |
| 2 | 9nn 9406 | . . . . . 6 ⊢ 9 ∈ ℕ | |
| 3 | 1nn 9248 | . . . . . 6 ⊢ 1 ∈ ℕ | |
| 4 | nnaddcl 9257 | . . . . . 6 ⊢ ((9 ∈ ℕ ∧ 1 ∈ ℕ) → (9 + 1) ∈ ℕ) | |
| 5 | 2, 3, 4 | mp2an 426 | . . . . 5 ⊢ (9 + 1) ∈ ℕ |
| 6 | 5 | nncni 9247 | . . . 4 ⊢ (9 + 1) ∈ ℂ |
| 7 | 6 | mulridi 8276 | . . 3 ⊢ ((9 + 1) · 1) = (9 + 1) |
| 8 | 7 | oveq1i 6060 | . 2 ⊢ (((9 + 1) · 1) + 0) = ((9 + 1) + 0) |
| 9 | 6 | addridi 8415 | . 2 ⊢ ((9 + 1) + 0) = (9 + 1) |
| 10 | 1, 8, 9 | 3eqtrri 2258 | 1 ⊢ (9 + 1) = ;10 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 ∈ wcel 2203 (class class class)co 6050 0cc0 8127 1c1 8128 + caddc 8130 · cmul 8132 ℕcn 9237 9c9 9295 ;cdc 9709 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 ax-sep 4228 ax-cnex 8218 ax-resscn 8219 ax-1cn 8220 ax-1re 8221 ax-icn 8222 ax-addcl 8223 ax-addrcl 8224 ax-mulcl 8225 ax-mulcom 8228 ax-addass 8229 ax-mulass 8230 ax-distr 8231 ax-1rid 8234 ax-0id 8235 ax-cnre 8238 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2815 df-un 3215 df-in 3217 df-ss 3224 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-int 3950 df-br 4110 df-iota 5312 df-fv 5360 df-ov 6053 df-inn 9238 df-2 9296 df-3 9297 df-4 9298 df-5 9299 df-6 9300 df-7 9301 df-8 9302 df-9 9303 df-dec 9710 |
| This theorem is referenced by: dfdec10 9712 10nn 9724 le9lt10 9735 decsucc 9749 5p5e10 9779 6p4e10 9780 7p3e10 9783 8p2e10 9788 9p2e11 9795 10m1e9 9804 9lt10 9839 sq10e99m1 11075 3dvds 12550 3dvdsdec 12551 3dvds2dec 12552 |
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