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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 12244 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7378 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12272 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11096 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11155 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2762 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12249 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7377 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2762 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12250 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2762 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 (class class class)co 7367 1c1 11039 + caddc 11041 2c2 12236 6c6 12240 7c7 12241 8c8 12242 |
| 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 2708 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 2715 df-cleq 2728 df-clel 2811 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-iota 6454 df-fv 6506 df-ov 7370 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 |
| This theorem is referenced by: 6p3e9 12336 6t3e18 12749 83prm 17093 1259lem2 17102 1259lem5 17105 2503lem2 17108 2503lem3 17109 4001lem1 17111 log2ub 26913 hgt750lem2 34796 3exp7 42492 3cubeslem3l 43118 resqrtvalex 44072 imsqrtvalex 44073 lhe4.4ex1a 44756 sin5tlem5 47325 fmtno5faclem3 48044 |
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