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| Mirrors > Home > ILE Home > Th. List > decmul1 | GIF version | ||
| Description: The product of a numeral with a number (no carry). (Contributed by AV, 22-Jul-2021.) (Revised by AV, 6-Sep-2021.) |
| Ref | Expression |
|---|---|
| decmul1.p | ⊢ 𝑃 ∈ ℕ0 |
| decmul1.a | ⊢ 𝐴 ∈ ℕ0 |
| decmul1.b | ⊢ 𝐵 ∈ ℕ0 |
| decmul1.n | ⊢ 𝑁 = ;𝐴𝐵 |
| decmul1.0 | ⊢ 𝐷 ∈ ℕ0 |
| decmul1.c | ⊢ (𝐴 · 𝑃) = 𝐶 |
| decmul1.d | ⊢ (𝐵 · 𝑃) = 𝐷 |
| Ref | Expression |
|---|---|
| decmul1 | ⊢ (𝑁 · 𝑃) = ;𝐶𝐷 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 10nn0 9773 | . . 3 ⊢ ;10 ∈ ℕ0 | |
| 2 | decmul1.p | . . 3 ⊢ 𝑃 ∈ ℕ0 | |
| 3 | decmul1.a | . . 3 ⊢ 𝐴 ∈ ℕ0 | |
| 4 | decmul1.b | . . 3 ⊢ 𝐵 ∈ ℕ0 | |
| 5 | decmul1.n | . . . 4 ⊢ 𝑁 = ;𝐴𝐵 | |
| 6 | dfdec10 9759 | . . . 4 ⊢ ;𝐴𝐵 = ((;10 · 𝐴) + 𝐵) | |
| 7 | 5, 6 | eqtri 2259 | . . 3 ⊢ 𝑁 = ((;10 · 𝐴) + 𝐵) |
| 8 | decmul1.0 | . . 3 ⊢ 𝐷 ∈ ℕ0 | |
| 9 | 0nn0 9557 | . . 3 ⊢ 0 ∈ ℕ0 | |
| 10 | 3, 2 | nn0mulcli 9580 | . . . . . 6 ⊢ (𝐴 · 𝑃) ∈ ℕ0 |
| 11 | 10 | nn0cni 9554 | . . . . 5 ⊢ (𝐴 · 𝑃) ∈ ℂ |
| 12 | 11 | addridi 8458 | . . . 4 ⊢ ((𝐴 · 𝑃) + 0) = (𝐴 · 𝑃) |
| 13 | decmul1.c | . . . 4 ⊢ (𝐴 · 𝑃) = 𝐶 | |
| 14 | 12, 13 | eqtri 2259 | . . 3 ⊢ ((𝐴 · 𝑃) + 0) = 𝐶 |
| 15 | decmul1.d | . . . . 5 ⊢ (𝐵 · 𝑃) = 𝐷 | |
| 16 | 15 | oveq2i 6086 | . . . 4 ⊢ (0 + (𝐵 · 𝑃)) = (0 + 𝐷) |
| 17 | 4, 2 | nn0mulcli 9580 | . . . . . 6 ⊢ (𝐵 · 𝑃) ∈ ℕ0 |
| 18 | 17 | nn0cni 9554 | . . . . 5 ⊢ (𝐵 · 𝑃) ∈ ℂ |
| 19 | 18 | addlidi 8459 | . . . 4 ⊢ (0 + (𝐵 · 𝑃)) = (𝐵 · 𝑃) |
| 20 | 1 | nn0cni 9554 | . . . . . . 7 ⊢ ;10 ∈ ℂ |
| 21 | 20 | mul01i 8708 | . . . . . 6 ⊢ (;10 · 0) = 0 |
| 22 | 21 | eqcomi 2242 | . . . . 5 ⊢ 0 = (;10 · 0) |
| 23 | 22 | oveq1i 6085 | . . . 4 ⊢ (0 + 𝐷) = ((;10 · 0) + 𝐷) |
| 24 | 16, 19, 23 | 3eqtr3i 2267 | . . 3 ⊢ (𝐵 · 𝑃) = ((;10 · 0) + 𝐷) |
| 25 | 1, 2, 3, 4, 7, 8, 9, 14, 24 | nummul1c 9804 | . 2 ⊢ (𝑁 · 𝑃) = ((;10 · 𝐶) + 𝐷) |
| 26 | dfdec10 9759 | . 2 ⊢ ;𝐶𝐷 = ((;10 · 𝐶) + 𝐷) | |
| 27 | 25, 26 | eqtr4i 2262 | 1 ⊢ (𝑁 · 𝑃) = ;𝐶𝐷 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 ∈ wcel 2209 (class class class)co 6075 0cc0 8169 1c1 8170 + caddc 8172 · cmul 8174 ℕ0cn0 9542 ;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: sq10 11128 2exp7 13191 |
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