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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 12238 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7372 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12266 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11090 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11149 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2763 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12243 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7371 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2763 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12244 | . 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 7361 1c1 11033 + caddc 11035 2c2 12230 6c6 12234 7c7 12235 8c8 12236 |
| 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 11090 ax-addcl 11092 ax-addass 11097 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-iota 6449 df-fv 6501 df-ov 7364 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 |
| This theorem is referenced by: 6p3e9 12330 6t3e18 12743 83prm 17087 1259lem2 17096 1259lem5 17099 2503lem2 17102 2503lem3 17103 4001lem1 17105 log2ub 26929 hgt750lem2 34815 3exp7 42509 3cubeslem3l 43135 resqrtvalex 44093 imsqrtvalex 44094 lhe4.4ex1a 44777 sin5tlem5 47344 fmtno5faclem3 48059 |
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