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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 12280 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7407 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12309 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11131 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11192 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2788 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12285 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7406 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2788 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12286 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2788 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1560 (class class class)co 7396 1c1 11074 + caddc 11076 2c2 12272 6c6 12276 7c7 12277 8c8 12278 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-ext 2734 ax-1cn 11131 ax-addcl 11133 ax-addass 11138 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-sb 2091 df-clab 2741 df-cleq 2754 df-clel 2837 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-ss 3921 df-nul 4286 df-if 4481 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-iota 6477 df-fv 6529 df-ov 7399 df-2 12280 df-3 12281 df-4 12282 df-5 12283 df-6 12284 df-7 12285 df-8 12286 |
| This theorem is referenced by: 6p3e9 12377 6t3e18 12798 83prm 17159 1259lem2 17168 1259lem5 17171 2503lem2 17174 2503lem3 17175 4001lem1 17177 log2ub 27014 hgt750lem2 34946 3exp7 42670 3cubeslem3l 43267 resqrtvalex 44221 imsqrtvalex 44222 lhe4.4ex1a 44905 sin5tlem5 47471 fmtno5faclem3 48190 |
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