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Mirrors > Home > ILE Home > Th. List > 3p2e5 | GIF version |
Description: 3 + 2 = 5. (Contributed by NM, 11-May-2004.) |
Ref | Expression |
---|---|
3p2e5 | ⊢ (3 + 2) = 5 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-2 8779 | . . . . 5 ⊢ 2 = (1 + 1) | |
2 | 1 | oveq2i 5785 | . . . 4 ⊢ (3 + 2) = (3 + (1 + 1)) |
3 | 3cn 8795 | . . . . 5 ⊢ 3 ∈ ℂ | |
4 | ax-1cn 7713 | . . . . 5 ⊢ 1 ∈ ℂ | |
5 | 3, 4, 4 | addassi 7774 | . . . 4 ⊢ ((3 + 1) + 1) = (3 + (1 + 1)) |
6 | 2, 5 | eqtr4i 2163 | . . 3 ⊢ (3 + 2) = ((3 + 1) + 1) |
7 | df-4 8781 | . . . 4 ⊢ 4 = (3 + 1) | |
8 | 7 | oveq1i 5784 | . . 3 ⊢ (4 + 1) = ((3 + 1) + 1) |
9 | 6, 8 | eqtr4i 2163 | . 2 ⊢ (3 + 2) = (4 + 1) |
10 | df-5 8782 | . 2 ⊢ 5 = (4 + 1) | |
11 | 9, 10 | eqtr4i 2163 | 1 ⊢ (3 + 2) = 5 |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 (class class class)co 5774 1c1 7621 + caddc 7623 2c2 8771 3c3 8772 4c4 8773 5c5 8774 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-resscn 7712 ax-1cn 7713 ax-1re 7714 ax-addrcl 7717 ax-addass 7722 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-rex 2422 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-br 3930 df-iota 5088 df-fv 5131 df-ov 5777 df-2 8779 df-3 8780 df-4 8781 df-5 8782 |
This theorem is referenced by: 3p3e6 8862 |
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