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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 12179 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7351 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12207 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11055 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11113 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2755 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12184 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7350 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2755 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12185 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2755 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 (class class class)co 7340 1c1 10998 + caddc 11000 2c2 12171 6c6 12175 7c7 12176 8c8 12177 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2701 ax-1cn 11055 ax-addcl 11057 ax-addass 11062 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-rab 3393 df-v 3435 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4281 df-if 4473 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-br 5089 df-iota 6432 df-fv 6484 df-ov 7343 df-2 12179 df-3 12180 df-4 12181 df-5 12182 df-6 12183 df-7 12184 df-8 12185 |
| This theorem is referenced by: 6p3e9 12271 6t3e18 12684 83prm 17021 1259lem2 17030 1259lem5 17033 2503lem2 17036 2503lem3 17037 4001lem1 17039 log2ub 26840 hgt750lem2 34633 3exp7 42043 3cubeslem3l 42676 resqrtvalex 43635 imsqrtvalex 43636 lhe4.4ex1a 44319 fmtno5faclem3 47579 |
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