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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 9602 | . 2 ⊢ ;10 = (((9 + 1) · 1) + 0) | |
| 2 | 9nn 9302 | . . . . . 6 ⊢ 9 ∈ ℕ | |
| 3 | 1nn 9144 | . . . . . 6 ⊢ 1 ∈ ℕ | |
| 4 | nnaddcl 9153 | . . . . . 6 ⊢ ((9 ∈ ℕ ∧ 1 ∈ ℕ) → (9 + 1) ∈ ℕ) | |
| 5 | 2, 3, 4 | mp2an 426 | . . . . 5 ⊢ (9 + 1) ∈ ℕ |
| 6 | 5 | nncni 9143 | . . . 4 ⊢ (9 + 1) ∈ ℂ |
| 7 | 6 | mulridi 8171 | . . 3 ⊢ ((9 + 1) · 1) = (9 + 1) |
| 8 | 7 | oveq1i 6023 | . 2 ⊢ (((9 + 1) · 1) + 0) = ((9 + 1) + 0) |
| 9 | 6 | addridi 8311 | . 2 ⊢ ((9 + 1) + 0) = (9 + 1) |
| 10 | 1, 8, 9 | 3eqtrri 2255 | 1 ⊢ (9 + 1) = ;10 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 ∈ wcel 2200 (class class class)co 6013 0cc0 8022 1c1 8023 + caddc 8025 · cmul 8027 ℕcn 9133 9c9 9191 ;cdc 9601 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-sep 4205 ax-cnex 8113 ax-resscn 8114 ax-1cn 8115 ax-1re 8116 ax-icn 8117 ax-addcl 8118 ax-addrcl 8119 ax-mulcl 8120 ax-mulcom 8123 ax-addass 8124 ax-mulass 8125 ax-distr 8126 ax-1rid 8129 ax-0id 8130 ax-cnre 8133 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-int 3927 df-br 4087 df-iota 5284 df-fv 5332 df-ov 6016 df-inn 9134 df-2 9192 df-3 9193 df-4 9194 df-5 9195 df-6 9196 df-7 9197 df-8 9198 df-9 9199 df-dec 9602 |
| This theorem is referenced by: dfdec10 9604 10nn 9616 le9lt10 9627 decsucc 9641 5p5e10 9671 6p4e10 9672 7p3e10 9675 8p2e10 9680 9p2e11 9687 10m1e9 9696 9lt10 9731 sq10e99m1 10965 3dvds 12415 3dvdsdec 12416 3dvds2dec 12417 |
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