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Mirrors > Home > ILE Home > Th. List > 5t5e25 | GIF version |
Description: 5 times 5 equals 25. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.) |
Ref | Expression |
---|---|
5t5e25 | ⊢ (5 · 5) = ;25 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 5nn0 8997 | . 2 ⊢ 5 ∈ ℕ0 | |
2 | 4nn0 8996 | . 2 ⊢ 4 ∈ ℕ0 | |
3 | df-5 8782 | . 2 ⊢ 5 = (4 + 1) | |
4 | 5t4e20 9283 | . . 3 ⊢ (5 · 4) = ;20 | |
5 | 2nn0 8994 | . . . 4 ⊢ 2 ∈ ℕ0 | |
6 | 5 | dec0u 9202 | . . 3 ⊢ (;10 · 2) = ;20 |
7 | 4, 6 | eqtr4i 2163 | . 2 ⊢ (5 · 4) = (;10 · 2) |
8 | dfdec10 9185 | . . 3 ⊢ ;25 = ((;10 · 2) + 5) | |
9 | 8 | eqcomi 2143 | . 2 ⊢ ((;10 · 2) + 5) = ;25 |
10 | 1, 2, 3, 7, 9 | 4t3lem 9278 | 1 ⊢ (5 · 5) = ;25 |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 (class class class)co 5774 0cc0 7620 1c1 7621 + caddc 7623 · cmul 7625 2c2 8771 4c4 8773 5c5 8774 ;cdc 9182 |
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-in1 603 ax-in2 604 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-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-setind 4452 ax-cnex 7711 ax-resscn 7712 ax-1cn 7713 ax-1re 7714 ax-icn 7715 ax-addcl 7716 ax-addrcl 7717 ax-mulcl 7718 ax-addcom 7720 ax-mulcom 7721 ax-addass 7722 ax-mulass 7723 ax-distr 7724 ax-i2m1 7725 ax-1rid 7727 ax-0id 7728 ax-rnegex 7729 ax-cnre 7731 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-ral 2421 df-rex 2422 df-reu 2423 df-rab 2425 df-v 2688 df-sbc 2910 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-opab 3990 df-id 4215 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-iota 5088 df-fun 5125 df-fv 5131 df-riota 5730 df-ov 5777 df-oprab 5778 df-mpo 5779 df-sub 7935 df-inn 8721 df-2 8779 df-3 8780 df-4 8781 df-5 8782 df-6 8783 df-7 8784 df-8 8785 df-9 8786 df-n0 8978 df-dec 9183 |
This theorem is referenced by: (None) |
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