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| Mirrors > Home > MPE Home > Th. List > 6p2e8 | Structured version Visualization version GIF version | ||
| Description: 6 + 2 = 8. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 6p2e8 | ⊢ (6 + 2) = 8 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-2 12412 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7435 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12441 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11265 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11326 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2786 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12417 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7434 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2786 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12418 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2786 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 (class class class)co 7424 1c1 11208 + caddc 11210 2c2 12404 6c6 12408 7c7 12409 8c8 12410 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-1cn 11265 ax-addcl 11267 ax-addass 11272 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-iota 6497 df-fv 6551 df-ov 7427 df-2 12412 df-3 12413 df-4 12414 df-5 12415 df-6 12416 df-7 12417 df-8 12418 |
| This theorem is used by: 6p3e9 12509 6t3e18 12931 83prm 17310 1259lem2 17319 1259lem5 17322 2503lem2 17325 2503lem3 17326 4001lem1 17328 log2ub 27286 hgt750lem2 35331 3exp7 43240 4p4e8ALT 43446 3cubeslem3l 43833 resqrtvalex 44782 imsqrtvalex 44783 lhe4.4ex1a 45450 sin5tlem5 48059 fmtno5faclem3 48802 |
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