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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 12220 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7379 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12248 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11096 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11154 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2763 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12225 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7378 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2763 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12226 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2763 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 (class class class)co 7368 1c1 11039 + caddc 11041 2c2 12212 6c6 12216 7c7 12217 8c8 12218 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-1cn 11096 ax-addcl 11098 ax-addass 11103 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-iota 6456 df-fv 6508 df-ov 7371 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 |
| This theorem is referenced by: 6p3e9 12312 6t3e18 12724 83prm 17062 1259lem2 17071 1259lem5 17074 2503lem2 17077 2503lem3 17078 4001lem1 17080 log2ub 26927 hgt750lem2 34830 3exp7 42423 3cubeslem3l 43043 resqrtvalex 44001 imsqrtvalex 44002 lhe4.4ex1a 44685 fmtno5faclem3 47941 |
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