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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 9400 | . 2 ⊢ 5 ∈ ℕ0 | |
| 2 | 3nn0 9398 | . 2 ⊢ 3 ∈ ℕ0 | |
| 3 | df-4 9182 | . 2 ⊢ 4 = (3 + 1) | |
| 4 | 5t3e15 9689 | . 2 ⊢ (5 · 3) = ;15 | |
| 5 | 1nn0 9396 | . . 3 ⊢ 1 ∈ ℕ0 | |
| 6 | eqid 2229 | . . 3 ⊢ ;15 = ;15 | |
| 7 | 1p1e2 9238 | . . 3 ⊢ (1 + 1) = 2 | |
| 8 | 5p5e10 9659 | . . 3 ⊢ (5 + 5) = ;10 | |
| 9 | 5, 1, 1, 6, 7, 8 | decaddci2 9650 | . 2 ⊢ (;15 + 5) = ;20 |
| 10 | 1, 2, 3, 4, 9 | 4t3lem 9685 | 1 ⊢ (5 · 4) = ;20 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 (class class class)co 6007 0cc0 8010 1c1 8011 · cmul 8015 2c2 9172 3c3 9173 4c4 9174 5c5 9175 ;cdc 9589 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-setind 4629 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-addcom 8110 ax-mulcom 8111 ax-addass 8112 ax-mulass 8113 ax-distr 8114 ax-i2m1 8115 ax-1rid 8117 ax-0id 8118 ax-rnegex 8119 ax-cnre 8121 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-br 4084 df-opab 4146 df-id 4384 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-iota 5278 df-fun 5320 df-fv 5326 df-riota 5960 df-ov 6010 df-oprab 6011 df-mpo 6012 df-sub 8330 df-inn 9122 df-2 9180 df-3 9181 df-4 9182 df-5 9183 df-6 9184 df-7 9185 df-8 9186 df-9 9187 df-n0 9381 df-dec 9590 |
| This theorem is referenced by: 5t5e25 9691 ex-fac 16147 |
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