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| Mirrors > Home > ILE Home > Th. List > 5p3e8 | GIF version | ||
| Description: 5 + 3 = 8. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 5p3e8 | ⊢ (5 + 3) = 8 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 9346 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 6089 | . . 3 ⊢ (5 + 3) = (5 + (2 + 1)) |
| 3 | 5cn 9366 | . . . 4 ⊢ 5 ∈ ℂ | |
| 4 | 2cn 9357 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 8265 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 8327 | . . 3 ⊢ ((5 + 2) + 1) = (5 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2262 | . 2 ⊢ (5 + 3) = ((5 + 2) + 1) |
| 8 | df-8 9351 | . . 3 ⊢ 8 = (7 + 1) | |
| 9 | 5p2e7 9433 | . . . 4 ⊢ (5 + 2) = 7 | |
| 10 | 9 | oveq1i 6088 | . . 3 ⊢ ((5 + 2) + 1) = (7 + 1) |
| 11 | 8, 10 | eqtr4i 2262 | . 2 ⊢ 8 = ((5 + 2) + 1) |
| 12 | 7, 11 | eqtr4i 2262 | 1 ⊢ (5 + 3) = 8 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 (class class class)co 6078 1c1 8173 + caddc 8175 2c2 9337 3c3 9338 5c5 9340 7c7 9342 8c8 9343 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-resscn 8264 ax-1cn 8265 ax-1re 8266 ax-addrcl 8269 ax-addass 8274 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-iota 5335 df-fv 5383 df-ov 6081 df-2 9345 df-3 9346 df-4 9347 df-5 9348 df-6 9349 df-7 9350 df-8 9351 |
| This theorem is referenced by: 5p4e9 9435 ef01bndlem 12504 2exp16 13197 lgsdir2lem1 16064 |
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