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Mirrors > Home > MPE Home > Th. List > 7t4e28 | Structured version Visualization version GIF version |
Description: 7 times 4 equals 28. (Contributed by Mario Carneiro, 19-Apr-2015.) |
Ref | Expression |
---|---|
7t4e28 | ⊢ (7 · 4) = ;28 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 7nn0 11352 | . 2 ⊢ 7 ∈ ℕ0 | |
2 | 3nn0 11348 | . 2 ⊢ 3 ∈ ℕ0 | |
3 | df-4 11119 | . 2 ⊢ 4 = (3 + 1) | |
4 | 7t3e21 11687 | . 2 ⊢ (7 · 3) = ;21 | |
5 | 2nn0 11347 | . . 3 ⊢ 2 ∈ ℕ0 | |
6 | 1nn0 11346 | . . 3 ⊢ 1 ∈ ℕ0 | |
7 | eqid 2651 | . . 3 ⊢ ;21 = ;21 | |
8 | 7cn 11142 | . . . 4 ⊢ 7 ∈ ℂ | |
9 | ax-1cn 10032 | . . . 4 ⊢ 1 ∈ ℂ | |
10 | 7p1e8 11195 | . . . 4 ⊢ (7 + 1) = 8 | |
11 | 8, 9, 10 | addcomli 10266 | . . 3 ⊢ (1 + 7) = 8 |
12 | 5, 6, 1, 7, 11 | decaddi 11617 | . 2 ⊢ (;21 + 7) = ;28 |
13 | 1, 2, 3, 4, 12 | 4t3lem 11669 | 1 ⊢ (7 · 4) = ;28 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1523 (class class class)co 6690 1c1 9975 · cmul 9979 2c2 11108 3c3 11109 4c4 11110 7c7 11113 8c8 11114 ;cdc 11531 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-pss 3623 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-tp 4215 df-op 4217 df-uni 4469 df-iun 4554 df-br 4686 df-opab 4746 df-mpt 4763 df-tr 4786 df-id 5053 df-eprel 5058 df-po 5064 df-so 5065 df-fr 5102 df-we 5104 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-pred 5718 df-ord 5764 df-on 5765 df-lim 5766 df-suc 5767 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-om 7108 df-wrecs 7452 df-recs 7513 df-rdg 7551 df-er 7787 df-en 7998 df-dom 7999 df-sdom 8000 df-pnf 10114 df-mnf 10115 df-ltxr 10117 df-sub 10306 df-nn 11059 df-2 11117 df-3 11118 df-4 11119 df-5 11120 df-6 11121 df-7 11122 df-8 11123 df-9 11124 df-n0 11331 df-dec 11532 |
This theorem is referenced by: 7t5e35 11689 83prm 15877 317prm 15880 1259prm 15890 hgt750lem2 30858 fmtno5faclem1 41816 |
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