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| Mirrors > Home > ILE Home > Th. List > 5t4e20 | GIF version | ||
| Description: 5 times 4 equals 20. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.) |
| Ref | Expression |
|---|---|
| 5t4e20 | ⊢ (5 · 4) = ;20 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 5nn0 9562 | . 2 ⊢ 5 ∈ ℕ0 | |
| 2 | 3nn0 9560 | . 2 ⊢ 3 ∈ ℕ0 | |
| 3 | df-4 9344 | . 2 ⊢ 4 = (3 + 1) | |
| 4 | 5t3e15 9856 | . 2 ⊢ (5 · 3) = ;15 | |
| 5 | 1nn0 9558 | . . 3 ⊢ 1 ∈ ℕ0 | |
| 6 | eqid 2238 | . . 3 ⊢ ;15 = ;15 | |
| 7 | 1p1e2 9400 | . . 3 ⊢ (1 + 1) = 2 | |
| 8 | 5p5e10 9826 | . . 3 ⊢ (5 + 5) = ;10 | |
| 9 | 5, 1, 1, 6, 7, 8 | decaddci2 9817 | . 2 ⊢ (;15 + 5) = ;20 |
| 10 | 1, 2, 3, 4, 9 | 4t3lem 9852 | 1 ⊢ (5 · 4) = ;20 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 (class class class)co 6075 0cc0 8169 1c1 8170 · cmul 8174 2c2 9334 3c3 9335 4c4 9336 5c5 9337 ;cdc 9756 |
| 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-in1 623 ax-in2 624 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-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-setind 4679 ax-cnex 8260 ax-resscn 8261 ax-1cn 8262 ax-1re 8263 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-addcom 8269 ax-mulcom 8270 ax-addass 8271 ax-mulass 8272 ax-distr 8273 ax-i2m1 8274 ax-1rid 8276 ax-0id 8277 ax-rnegex 8278 ax-cnre 8280 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-int 3966 df-br 4126 df-opab 4188 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-iota 5332 df-fun 5374 df-fv 5380 df-riota 6028 df-ov 6078 df-oprab 6079 df-mpo 6080 df-sub 8489 df-inn 9284 df-2 9342 df-3 9343 df-4 9344 df-5 9345 df-6 9346 df-7 9347 df-8 9348 df-9 9349 df-n0 9543 df-dec 9757 |
| This theorem is referenced by: 5t5e25 9858 ex-fac 16656 |
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