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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 12266 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7392 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12295 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11117 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11178 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2778 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12271 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7391 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2778 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12272 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2778 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1550 (class class class)co 7381 1c1 11060 + caddc 11062 2c2 12258 6c6 12262 7c7 12263 8c8 12264 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-ext 2724 ax-1cn 11117 ax-addcl 11119 ax-addass 11124 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-sb 2081 df-clab 2731 df-cleq 2744 df-clel 2827 df-rab 3405 df-v 3446 df-dif 3898 df-un 3900 df-ss 3912 df-nul 4277 df-if 4471 df-sn 4573 df-pr 4575 df-op 4579 df-uni 4856 df-br 5091 df-iota 6462 df-fv 6514 df-ov 7384 df-2 12266 df-3 12267 df-4 12268 df-5 12269 df-6 12270 df-7 12271 df-8 12272 |
| This theorem is referenced by: 6p3e9 12363 6t3e18 12784 83prm 17131 1259lem2 17140 1259lem5 17143 2503lem2 17146 2503lem3 17147 4001lem1 17149 log2ub 26980 hgt750lem2 34893 3exp7 42608 3cubeslem3l 43205 resqrtvalex 44159 imsqrtvalex 44160 lhe4.4ex1a 44843 sin5tlem5 47409 fmtno5faclem3 48128 |
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