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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 12208 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7369 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12236 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11084 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11142 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2762 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12213 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7368 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2762 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12214 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2762 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 (class class class)co 7358 1c1 11027 + caddc 11029 2c2 12200 6c6 12204 7c7 12205 8c8 12206 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-1cn 11084 ax-addcl 11086 ax-addass 11091 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-iota 6448 df-fv 6500 df-ov 7361 df-2 12208 df-3 12209 df-4 12210 df-5 12211 df-6 12212 df-7 12213 df-8 12214 |
| This theorem is referenced by: 6p3e9 12300 6t3e18 12712 83prm 17050 1259lem2 17059 1259lem5 17062 2503lem2 17065 2503lem3 17066 4001lem1 17068 log2ub 26915 hgt750lem2 34809 3exp7 42307 3cubeslem3l 42928 resqrtvalex 43886 imsqrtvalex 43887 lhe4.4ex1a 44570 fmtno5faclem3 47827 |
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