| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dfdec100 | Structured version Visualization version GIF version | ||
| Description: Split the hundreds from a decimal value. (Contributed by Thierry Arnoux, 25-Dec-2021.) |
| Ref | Expression |
|---|---|
| dfdec100.a | ⊢ 𝐴 ∈ ℕ0 |
| dfdec100.b | ⊢ 𝐵 ∈ ℕ0 |
| dfdec100.c | ⊢ 𝐶 ∈ ℝ |
| Ref | Expression |
|---|---|
| dfdec100 | ⊢ ;;𝐴𝐵𝐶 = ((;;100 · 𝐴) + ;𝐵𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfdec10 12855 | . . 3 ⊢ ;𝐵𝐶 = ((;10 · 𝐵) + 𝐶) | |
| 2 | 1 | oveq2i 7460 | . 2 ⊢ ((;;100 · 𝐴) + ;𝐵𝐶) = ((;;100 · 𝐴) + ((;10 · 𝐵) + 𝐶)) |
| 3 | 10nn0 12874 | . . . . . 6 ⊢ ;10 ∈ ℕ0 | |
| 4 | 3 | dec0u 12878 | . . . . 5 ⊢ (;10 · ;10) = ;;100 |
| 5 | 3 | nn0cni 12656 | . . . . . 6 ⊢ ;10 ∈ ℂ |
| 6 | 5, 5 | mulcli 11353 | . . . . 5 ⊢ (;10 · ;10) ∈ ℂ |
| 7 | 4, 6 | eqeltrri 2861 | . . . 4 ⊢ ;;100 ∈ ℂ |
| 8 | dfdec100.a | . . . . 5 ⊢ 𝐴 ∈ ℕ0 | |
| 9 | 8 | nn0cni 12656 | . . . 4 ⊢ 𝐴 ∈ ℂ |
| 10 | 7, 9 | mulcli 11353 | . . 3 ⊢ (;;100 · 𝐴) ∈ ℂ |
| 11 | dfdec100.b | . . . . 5 ⊢ 𝐵 ∈ ℕ0 | |
| 12 | 11 | nn0cni 12656 | . . . 4 ⊢ 𝐵 ∈ ℂ |
| 13 | 5, 12 | mulcli 11353 | . . 3 ⊢ (;10 · 𝐵) ∈ ℂ |
| 14 | dfdec100.c | . . . 4 ⊢ 𝐶 ∈ ℝ | |
| 15 | 14 | recni 11360 | . . 3 ⊢ 𝐶 ∈ ℂ |
| 16 | 10, 13, 15 | addassi 11356 | . 2 ⊢ (((;;100 · 𝐴) + (;10 · 𝐵)) + 𝐶) = ((;;100 · 𝐴) + ((;10 · 𝐵) + 𝐶)) |
| 17 | dfdec10 12855 | . . 3 ⊢ ;;𝐴𝐵𝐶 = ((;10 · ;𝐴𝐵) + 𝐶) | |
| 18 | dfdec10 12855 | . . . . . 6 ⊢ ;𝐴𝐵 = ((;10 · 𝐴) + 𝐵) | |
| 19 | 18 | oveq2i 7460 | . . . . 5 ⊢ (;10 · ;𝐴𝐵) = (;10 · ((;10 · 𝐴) + 𝐵)) |
| 20 | 5, 9 | mulcli 11353 | . . . . . 6 ⊢ (;10 · 𝐴) ∈ ℂ |
| 21 | 5, 20, 12 | adddii 11358 | . . . . 5 ⊢ (;10 · ((;10 · 𝐴) + 𝐵)) = ((;10 · (;10 · 𝐴)) + (;10 · 𝐵)) |
| 22 | 5, 5, 9 | mulassi 11357 | . . . . . . 7 ⊢ ((;10 · ;10) · 𝐴) = (;10 · (;10 · 𝐴)) |
| 23 | 4 | oveq1i 7459 | . . . . . . 7 ⊢ ((;10 · ;10) · 𝐴) = (;;100 · 𝐴) |
| 24 | 22, 23 | eqtr3i 2788 | . . . . . 6 ⊢ (;10 · (;10 · 𝐴)) = (;;100 · 𝐴) |
| 25 | 24 | oveq1i 7459 | . . . . 5 ⊢ ((;10 · (;10 · 𝐴)) + (;10 · 𝐵)) = ((;;100 · 𝐴) + (;10 · 𝐵)) |
| 26 | 19, 21, 25 | 3eqtri 2790 | . . . 4 ⊢ (;10 · ;𝐴𝐵) = ((;;100 · 𝐴) + (;10 · 𝐵)) |
| 27 | 26 | oveq1i 7459 | . . 3 ⊢ ((;10 · ;𝐴𝐵) + 𝐶) = (((;;100 · 𝐴) + (;10 · 𝐵)) + 𝐶) |
| 28 | 17, 27 | eqtr2i 2787 | . 2 ⊢ (((;;100 · 𝐴) + (;10 · 𝐵)) + 𝐶) = ;;𝐴𝐵𝐶 |
| 29 | 2, 16, 28 | 3eqtr2ri 2793 | 1 ⊢ ;;𝐴𝐵𝐶 = ((;;100 · 𝐴) + ;𝐵𝐶) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2147 (class class class)co 7449 ℂcc 11235 ℝcr 11236 0cc0 11237 1c1 11238 + caddc 11240 · cmul 11242 ℕ0cn0 12644 ;cdc 12852 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7781 ax-resscn 11294 ax-1cn 11295 ax-icn 11296 ax-addcl 11297 ax-addrcl 11298 ax-mulcl 11299 ax-mulrcl 11300 ax-mulcom 11301 ax-addass 11302 ax-mulass 11303 ax-distr 11304 ax-i2m1 11305 ax-1ne0 11306 ax-1rid 11307 ax-rnegex 11308 ax-rrecex 11309 ax-cnre 11310 ax-pre-lttri 11311 ax-pre-lttrn 11312 ax-pre-ltadd 11313 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6328 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6518 df-fun 6566 df-fn 6567 df-f 6568 df-f1 6569 df-fo 6570 df-f1o 6571 df-fv 6572 df-ov 7452 df-om 7910 df-2nd 8034 df-frecs 8335 df-wrecs 8366 df-recs 8415 df-rdg 8454 df-er 8753 df-en 9010 df-dom 9011 df-sdom 9012 df-pnf 11382 df-mnf 11383 df-ltxr 11385 df-nn 12374 df-2 12443 df-3 12444 df-4 12445 df-5 12446 df-6 12447 df-7 12448 df-8 12449 df-9 12450 df-n0 12645 df-dec 12853 |
| This theorem is used by: dpmul100 33549 dpmul1000 33551 dpmul4 33566 |
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