novaBBS - sci.math - Re: Simple Multiplication...

Simple Multiplication...

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From: chris.m....@gmail.com (Chris M. Thomasson)
Newsgroups: sci.math
Subject: Simple Multiplication...
Date: Mon, 31 May 2021 16:41:48 -0700
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by: Chris M. Thomasson - Mon, 31 May 2021 23:41 UTC

My little cousin asked me to multiply 34*3, and show him the work...

So, in my head, I said it is equal to:

3*3*10 + 3*4*1 = 102

His mom said I was wrong because I did not show how to carry!

ARGH!

Re: Simple Multiplication...

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From: erra...@nomail.afraid.org (FromTheRafters)
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Subject: Re: Simple Multiplication...
Date: Mon, 31 May 2021 20:48:05 -0400
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by: FromTheRafters - Tue, 1 Jun 2021 00:48 UTC

Chris M. Thomasson laid this down on his screen :
> My little cousin asked me to multiply 34*3, and show him the work...
>
> So, in my head, I said it is equal to:
>
> 3*3*10 + 3*4*1 = 102
>
> His mom said I was wrong because I did not show how to carry!
>
> ARGH!

I'd just figure it was a tad over 100 and divisible by three.

Re: Simple Multiplication...

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From: imva...@invalid.com (Sergio)
Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Mon, 31 May 2021 21:22:13 -0500
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by: Sergio - Tue, 1 Jun 2021 02:22 UTC

On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
> My little cousin asked me to multiply 34*3, and show him the work...
>
> So, in my head, I said it is equal to:
>
> 3*3*10 + 3*4*1 = 102
>
> His mom said I was wrong because I did not show how to carry!
>
> ARGH!

less accurate, but faster,
to do it from front to back, get it in the ballpark, for head math...

3*3 = 9 or 90

3*4 = 12

90 + 12 = 102 exactomundo

to easy...

71 * 82 ? [5822]

7*8 = 56 or 5600

1*2 = 2

since they are only 9 apart take 9/2 = 4.5 or 45

5600 + 2 + 45 =5647

5647/5822 = .97 OR 3% low

.....................

(add real cross term)
8 + 14 = 22 or 220
220 + 5600 + 2 = 5822

........................

see how bad it is with a square
square -- 71*71 [=5041]

7*7 = 49 or 4900
1 cross term 0 * 10

for 4900+1+0*10 = 4901 => about 2.8% low

..................

OK smartie, try 93 * 27 ? [2511]

1800
21
cross is about 60 (just glancing at it)=> 600

1800 + 600 +21 = 2421 or 3.6% low

Re: Simple Multiplication...

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From: chris.m....@gmail.com (Chris M. Thomasson)
Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Mon, 31 May 2021 20:54:25 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 03:54 UTC

On 5/31/2021 5:48 PM, FromTheRafters wrote:
> Chris M. Thomasson laid this down on his screen :
>> My little cousin asked me to multiply 34*3, and show him the work...
>>
>> So, in my head, I said it is equal to:
>>
>> 3*3*10 + 3*4*1 = 102
>>
>> His mom said I was wrong because I did not show how to carry!
>>
>> ARGH!
>
> I'd just figure it was a tad over 100 and divisible by three.

:^D Indeed!

Re: Simple Multiplication...

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From: chris.m....@gmail.com (Chris M. Thomasson)
Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Mon, 31 May 2021 21:13:00 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 04:13 UTC

On 5/31/2021 7:22 PM, Sergio wrote:
> On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
>> My little cousin asked me to multiply 34*3, and show him the work...
>>
>> So, in my head, I said it is equal to:
>>
>> 3*3*10 + 3*4*1 = 102
>>
>> His mom said I was wrong because I did not show how to carry!
>>
>> ARGH!
>
>
> less accurate, but faster,

Exactly!

> to do it from front to back, get it in the ballpark, for head math...
>
> 3*3 = 9 or 90
>
> 3*4 = 12
>
> 90 + 12 = 102 exactomundo
>
> to easy...

Well, his Mom said I did not do the carry. So, shit!

> 71 * 82 ? [5822]

Nice!

>
> 7*8 = 56 or 5600
>
> 1*2 = 2
>
> since they are only 9 apart take 9/2 = 4.5 or 45
>
> 5600 + 2 + 45 =5647
>
> 5647/5822 = .97 OR 3% low
>
> ....................
>
>
> (add real cross term)
> 8 + 14 = 22 or 220
> 220 + 5600 + 2 = 5822
>
>
> .......................
>
> see how bad it is with a square
> square -- 71*71 [=5041]
>
> 7*7 = 49 or 4900
> 1
> cross term 0 * 10
>
> for 4900+1+0*10 = 4901 => about 2.8% low
>
>
> .................
>
> OK smartie, try 93 * 27 ? [2511]
>
> 1800
> 21
> cross is about 60 (just glancing at it)=> 600
>
> 1800 + 600 +21 = 2421 or 3.6% low
>

Re: Simple Multiplication...

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From: chris.m....@gmail.com (Chris M. Thomasson)
Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Mon, 31 May 2021 21:16:35 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 04:16 UTC

On 5/31/2021 9:13 PM, Chris M. Thomasson wrote:
> On 5/31/2021 7:22 PM, Sergio wrote:
>> On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
>>> My little cousin asked me to multiply 34*3, and show him the work...
>>>
>>> So, in my head, I said it is equal to:
>>>
>>> 3*3*10 + 3*4*1 = 102
>>>
>>> His mom said I was wrong because I did not show how to carry!
>>>
>>> ARGH!
>>
>>
>> less accurate, but faster,
>
> Exactly!
>
>
>> to do it from front to back, get it in the ballpark, for head math...
>>
>> 3*3 = 9 or 90
>>
>> 3*4 = 12
>>
>> 90 + 12 = 102 exactomundo
>>
>> to easy...
>
> Well, his Mom said I did not do the carry. So, shit!
>
>
>> 71 * 82 ? [5822]
>
> Nice!

What about:

82*7*10 + 82*1*1 = 5822

;^)

Re: Simple Multiplication...

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From: chris.m....@gmail.com (Chris M. Thomasson)
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Subject: Re: Simple Multiplication...
Date: Mon, 31 May 2021 21:21:10 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 04:21 UTC

On 5/31/2021 9:16 PM, Chris M. Thomasson wrote:
> On 5/31/2021 9:13 PM, Chris M. Thomasson wrote:
>> On 5/31/2021 7:22 PM, Sergio wrote:
>>> On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
>>>> My little cousin asked me to multiply 34*3, and show him the work...
>>>>
>>>> So, in my head, I said it is equal to:
>>>>
>>>> 3*3*10 + 3*4*1 = 102
>>>>
>>>> His mom said I was wrong because I did not show how to carry!
>>>>
>>>> ARGH!
>>>
>>>
>>> less accurate, but faster,
>>
>> Exactly!
>>
>>
>>> to do it from front to back, get it in the ballpark, for head math...
>>>
>>> 3*3 = 9 or 90
>>>
>>> 3*4 = 12
>>>
>>> 90 + 12 = 102 exactomundo
>>>
>>> to easy...
>>
>> Well, his Mom said I did not do the carry. So, shit!
>>
>>
>>> 71 * 82 ? [5822]
>>
>> Nice!
>
> What about:
>
> 82*7*10 + 82*1*1 = 5822
>
> ;^)

Therefore what about:

(7*8*10+7*2*1)*10 + 82*1*1 = 5822

Re: Simple Multiplication...

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From: chris.m....@gmail.com (Chris M. Thomasson)
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Subject: Re: Simple Multiplication...
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by: Chris M. Thomasson - Tue, 1 Jun 2021 04:28 UTC

On 5/31/2021 9:21 PM, Chris M. Thomasson wrote:
> On 5/31/2021 9:16 PM, Chris M. Thomasson wrote:
>> On 5/31/2021 9:13 PM, Chris M. Thomasson wrote:
>>> On 5/31/2021 7:22 PM, Sergio wrote:
>>>> On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
>>>>> My little cousin asked me to multiply 34*3, and show him the work...
>>>>>
>>>>> So, in my head, I said it is equal to:
>>>>>
>>>>> 3*3*10 + 3*4*1 = 102
>>>>>
>>>>> His mom said I was wrong because I did not show how to carry!
>>>>>
>>>>> ARGH!
>>>>
>>>>
>>>> less accurate, but faster,
>>>
>>> Exactly!
>>>
>>>
>>>> to do it from front to back, get it in the ballpark, for head math...
>>>>
>>>> 3*3 = 9 or 90
>>>>
>>>> 3*4 = 12
>>>>
>>>> 90 + 12 = 102 exactomundo
>>>>
>>>> to easy...
>>>
>>> Well, his Mom said I did not do the carry. So, shit!
>>>
>>>
>>>> 71 * 82 ? [5822]
>>>
>>> Nice!
>>
>> What about:
>>
>> 82*7*10 + 82*1*1 = 5822
>>
>> ;^)
>
> Therefore what about:
>
> (7*8*10+7*2*1)*10 + 82*1*1 = 5822
>

Getting close to final form would be:

(7*8*10+7*2*1)*10+(1*8*10 + 1*2) = 5822

Re: Simple Multiplication...

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From: erra...@nomail.afraid.org (FromTheRafters)
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Subject: Re: Simple Multiplication...
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by: FromTheRafters - Tue, 1 Jun 2021 08:25 UTC

It happens that Chris M. Thomasson formulated :
> On 5/31/2021 5:48 PM, FromTheRafters wrote:
>> Chris M. Thomasson laid this down on his screen :
>>> My little cousin asked me to multiply 34*3, and show him the work...
>>>
>>> So, in my head, I said it is equal to:
>>>
>>> 3*3*10 + 3*4*1 = 102
>>>
>>> His mom said I was wrong because I did not show how to carry!
>>>
>>> ARGH!
>>
>> I'd just figure it was a tad over 100 and divisible by three.
>
> :^D Indeed!

My sister and I were watching "Who Wants To Be A Millionare" and they
had a multiple choice question about 'If a cat really had nine lives,
how many years would it live?'

Sis spent her young working life as a veterinarian's assistant, so she
knew the average lifespan of cats and made her guess by multiplying by
ten (close enough to nine) to get in the ballpark knowing it was a high
estimate she found an answer that was close.

I had a ballpark figure also, but realized the answer would be
divisible by three (cats have 3 times 3 lives) and picked the one in
the ballpark which also was divisible by three before she had the
chance to make her guess.

She's not a math person and asked me how I got the correct answer so
quickly, so I explained. Another day a week or so later they had a
Yahtzee question about probabilities of throwing five ones or twos or
threes etcetera, any five of a kind. I figured the dice have six sides
and again two answers were in the ballpark one of which was divisible
by three. Not even thinking about the number of sides on a die she
noticed the specificity of the answers and did the little 'divisible by
three' check and got the right answer.

Sometimes, there is an easier way to do things.

Re: Simple Multiplication...

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by: Eram semper recta - Tue, 1 Jun 2021 11:15 UTC

On Monday, 31 May 2021 at 19:41:58 UTC-4, Chris M. Thomasson wrote:
> My little cousin asked me to multiply 34*3, and show him the work...
>
> So, in my head, I said it is equal to:
>
> 3*3*10 + 3*4*1 = 102

What an obfuscated way to teach anyone how to multiply. It's even worse than Simon Stevin's rote method.

A simpler way:

30*3 + 4*3 = 90 + 12 = 90 + 10 + 2 = 100 + 0 + 2

>
> His mom said I was wrong because I did not show how to carry!

She is right about the carry. After all, the multiplication process in decimal (ala Simon Stevin) is designed to represent a number, viz 102/1 in decimal:

Hundreds Tens Units
____1____ _________2___

So, 90 + 12

_______ __9___ ______
_______ __1___ __2___
_______ __10__ __2___

But since we only use digits 1-9 in the decimal system, we write the last line as:

____1____ _________2___

>
> ARGH!

Yep. You're an idiot and nothing will ever change this.

1/3 has no measure in decimal, but 102/1 does:

Hundreds Tens Units
____1____ _________2___

Re: Simple Multiplication...

<s95cig$kvu$1@gioia.aioe.org>

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From: imva...@invalid.com (Sergio)
Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Tue, 1 Jun 2021 08:26:41 -0500
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by: Sergio - Tue, 1 Jun 2021 13:26 UTC

On 5/31/2021 11:28 PM, Chris M. Thomasson wrote:
> On 5/31/2021 9:21 PM, Chris M. Thomasson wrote:
>> On 5/31/2021 9:16 PM, Chris M. Thomasson wrote:
>>> On 5/31/2021 9:13 PM, Chris M. Thomasson wrote:
>>>> On 5/31/2021 7:22 PM, Sergio wrote:
>>>>> On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
>>>>>> My little cousin asked me to multiply 34*3, and show him the work...
>>>>>>
>>>>>> So, in my head, I said it is equal to:
>>>>>>
>>>>>> 3*3*10 + 3*4*1 = 102
>>>>>>
>>>>>> His mom said I was wrong because I did not show how to carry!
>>>>>>
>>>>>> ARGH!
>>>>>
>>>>>
>>>>> less accurate, but faster,
>>>>
>>>> Exactly!
>>>>
>>>>
>>>>> to do it from front to back, get it in the ballpark, for head math...
>>>>>
>>>>> 3*3 = 9 or 90
>>>>>
>>>>> 3*4 = 12
>>>>>
>>>>> 90 + 12 = 102 exactomundo
>>>>>
>>>>> to easy...
>>>>
>>>> Well, his Mom said I did not do the carry. So, shit!
>>>>
>>>>
>>>>> 71 * 82 ? [5822]
>>>>
>>>> Nice!
>>>
>>> What about:
>>>
>>> 82*7*10 + 82*1*1 = 5822
>>>
>>> ;^)
>>
>> Therefore what about:
>>
>> (7*8*10+7*2*1)*10 + 82*1*1 = 5822
>>
>
> Getting close to final form would be:
>
> (7*8*10+7*2*1)*10+(1*8*10 + 1*2) = 5822
>
>

redux to 7,2,1

(7*(7+1)*(7+2+1))+(7+2+1))*(7+2+1)+(1*(7+1)*(7+2+1)+2*1)) =5822

(seems like the wrong way to go, aha! try Binary!)

1000111 * 1010010 = 1011010111110 (ugh, makes my eyes squirm)

1,000,111 * 1,010,010 = 1,011,010,111,110 (... perhaps QR code?)

Re: Simple Multiplication...

<s965vg$110u$1@gioia.aioe.org>

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From: chris.m....@gmail.com (Chris M. Thomasson)
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Subject: Re: Simple Multiplication...
Date: Tue, 1 Jun 2021 13:40:16 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 20:40 UTC

On 6/1/2021 6:26 AM, Sergio wrote:
> On 5/31/2021 11:28 PM, Chris M. Thomasson wrote:
>> On 5/31/2021 9:21 PM, Chris M. Thomasson wrote:
>>> On 5/31/2021 9:16 PM, Chris M. Thomasson wrote:
>>>> On 5/31/2021 9:13 PM, Chris M. Thomasson wrote:
>>>>> On 5/31/2021 7:22 PM, Sergio wrote:
>>>>>> On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
>>>>>>> My little cousin asked me to multiply 34*3, and show him the work...
>>>>>>>
>>>>>>> So, in my head, I said it is equal to:
>>>>>>>
>>>>>>> 3*3*10 + 3*4*1 = 102
>>>>>>>
>>>>>>> His mom said I was wrong because I did not show how to carry!
>>>>>>>
>>>>>>> ARGH!
>>>>>>
>>>>>>
>>>>>> less accurate, but faster,
>>>>>
>>>>> Exactly!
>>>>>
>>>>>
>>>>>> to do it from front to back, get it in the ballpark, for head math...
>>>>>>
>>>>>> 3*3 = 9 or 90
>>>>>>
>>>>>> 3*4 = 12
>>>>>>
>>>>>> 90 + 12 = 102 exactomundo
>>>>>>
>>>>>> to easy...
>>>>>
>>>>> Well, his Mom said I did not do the carry. So, shit!
>>>>>
>>>>>
>>>>>> 71 * 82 ? [5822]
>>>>>
>>>>> Nice!
>>>>
>>>> What about:
>>>>
>>>> 82*7*10 + 82*1*1 = 5822
>>>>
>>>> ;^)
>>>
>>> Therefore what about:
>>>
>>> (7*8*10+7*2*1)*10 + 82*1*1 = 5822
>>>
>>
>> Getting close to final form would be:
>>
>> (7*8*10+7*2*1)*10+(1*8*10 + 1*2) = 5822
>>
>>
>
> redux to 7,2,1
>
> (7*(7+1)*(7+2+1))+(7+2+1))*(7+2+1)+(1*(7+1)*(7+2+1)+2*1)) =5822

I think you have mismatched parentheses here:

https://www.wolframalpha.com/input/?i=%287*%287%2B1%29*%287%2B2%2B1%29%29%2B%287%2B2%2B1%29%29*%287%2B2%2B1%29%2B%281*%287%2B1%29*%287%2B2%2B1%29%2B2*1%29%29

>
> (seems like the wrong way to go, aha! try Binary!)
>
> 1000111 * 1010010 = 1011010111110 (ugh, makes my eyes squirm)
>
> 1,000,111 * 1,010,010 = 1,011,010,111,110 (... perhaps QR code?)
>

;^)

Re: Simple Multiplication...

<s96650$110u$2@gioia.aioe.org>

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From: chris.m....@gmail.com (Chris M. Thomasson)
Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Tue, 1 Jun 2021 13:43:13 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 20:43 UTC

That works fine.

>
>>
>> His mom said I was wrong because I did not show how to carry!
>
> She is right about the carry. After all, the multiplication process in decimal (ala Simon Stevin) is designed to represent a number, viz 102/1 in decimal:
>
> Hundreds Tens Units
> ____1____ _________2___
>
> So, 90 + 12
>
> _______ __9___ ______
> _______ __1___ __2___
> _______ __10__ __2___
>
> But since we only use digits 1-9 in the decimal system, we write the last line as:
>
> ____1____ _________2___
>
>>
>> ARGH!
>
> Yep. You're an idiot and nothing will ever change this.

lol! Well, I did not show him how to carry, touche. I know how to do it,
but failed to actually show him. So, yeah: That was bad on my part. Shit
happens! Argh again. ;^o

>
> 1/3 has no measure in decimal, but 102/1 does:
>
> Hundreds Tens Units
> ____1____ _________2___
>

Re: Simple Multiplication...

<s9669h$110u$3@gioia.aioe.org>

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From: chris.m....@gmail.com (Chris M. Thomasson)
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Subject: Re: Simple Multiplication...
Date: Tue, 1 Jun 2021 13:45:37 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 20:45 UTC

On 6/1/2021 4:15 AM, Eram semper recta wrote:
> On Monday, 31 May 2021 at 19:41:58 UTC-4, Chris M. Thomasson wrote:
>> My little cousin asked me to multiply 34*3, and show him the work...
>>
>> So, in my head, I said it is equal to:
>>
>> 3*3*10 + 3*4*1 = 102
>
> What an obfuscated way to teach anyone how to multiply. It's even worse than Simon Stevin's rote method.
>
> A simpler way:
>
> 30*3 + 4*3 = 90 + 12 = 90 + 10 + 2 = 100 + 0 + 2
>
>>
>> His mom said I was wrong because I did not show how to carry!
>
> She is right about the carry. After all, the multiplication process in decimal (ala Simon Stevin) is designed to represent a number, viz 102/1 in decimal:
>
> Hundreds Tens Units
> ____1____ _________2___
>
> So, 90 + 12
>
> _______ __9___ ______
> _______ __1___ __2___
> _______ __10__ __2___
>
> But since we only use digits 1-9 in the decimal system, we write the last line as:
>
> ____1____ _________2___
>
>>
>> ARGH!
>
> Yep. You're an idiot and nothing will ever change this.
>
> 1/3 has no measure in decimal, but 102/1 does:
>
> Hundreds Tens Units
> ____1____ _________2___
>

http://fractallife247.com/test/hmac_cipher/ver_0_0_0_1?ct_hmac_cipher=d7d945d75108b039a9082b9fb7995652906cd138bad9817da06efbf5dcaff969b82682b9363a23b90a150bcc7baa3f174605aef9b475ff568112f3bec3e67e56965daa4607d3a08c197879162186b67cba63df9dd50da57915da4deedf493a3f315dd4658710e9df01f9f1c6de2551cb3a44ffd3ed338963c958980f36693634d9160e7f3f1f7e8287c3ec257393cad113401b5d0799

Re: Simple Multiplication...

<s9682a$1sp9$1@gioia.aioe.org>

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Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Tue, 1 Jun 2021 14:15:54 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 21:15 UTC

I am wondering what you think about the following Mr Wizard video:

https://youtu.be/HfxfsSoRPmU

Re: Simple Multiplication...

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Subject: Re: Simple Multiplication...
Date: Tue, 1 Jun 2021 14:16:38 -0700
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by: Chris M. Thomasson - Tue, 1 Jun 2021 21:16 UTC

On 6/1/2021 2:15 PM, Chris M. Thomasson wrote:
> On 6/1/2021 4:15 AM, Eram semper recta wrote:
>> On Monday, 31 May 2021 at 19:41:58 UTC-4, Chris M. Thomasson wrote:
>>> My little cousin asked me to multiply 34*3, and show him the work...
>>>
>>> So, in my head, I said it is equal to:
>>>
>>> 3*3*10 + 3*4*1 = 102
>>
>> What an obfuscated way to teach anyone how to multiply. It's even
>> worse than Simon Stevin's rote method.
>>
>> A simpler way:
>>
>> 30*3 + 4*3 = 90 + 12 = 90 + 10 + 2 = 100 + 0 + 2
[...]
> I am wondering what you think about the following Mr Wizard video:
>
> https://youtu.be/HfxfsSoRPmU
>
> ?

My Aunt loves it!

Re: Simple Multiplication...

<s96jq2$1v96$1@gioia.aioe.org>

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Newsgroups: sci.math
Subject: Re: Simple Multiplication...
Date: Tue, 1 Jun 2021 19:36:19 -0500
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by: Sergio - Wed, 2 Jun 2021 00:36 UTC

On 6/1/2021 3:40 PM, Chris M. Thomasson wrote:
> On 6/1/2021 6:26 AM, Sergio wrote:
>> On 5/31/2021 11:28 PM, Chris M. Thomasson wrote:
>>> On 5/31/2021 9:21 PM, Chris M. Thomasson wrote:
>>>> On 5/31/2021 9:16 PM, Chris M. Thomasson wrote:
>>>>> On 5/31/2021 9:13 PM, Chris M. Thomasson wrote:
>>>>>> On 5/31/2021 7:22 PM, Sergio wrote:
>>>>>>> On 5/31/2021 6:41 PM, Chris M. Thomasson wrote:
>>>>>>>> My little cousin asked me to multiply 34*3, and show him the
>>>>>>>> work...
>>>>>>>>
>>>>>>>> So, in my head, I said it is equal to:
>>>>>>>>
>>>>>>>> 3*3*10 + 3*4*1 = 102
>>>>>>>>
>>>>>>>> His mom said I was wrong because I did not show how to carry!
>>>>>>>>
>>>>>>>> ARGH!
>>>>>>>
>>>>>>>
>>>>>>> less accurate, but faster,
>>>>>>
>>>>>> Exactly!
>>>>>>
>>>>>>
>>>>>>> to do it from front to back, get it in the ballpark, for head
>>>>>>> math...
>>>>>>>
>>>>>>> 3*3 = 9 or 90
>>>>>>>
>>>>>>> 3*4 = 12
>>>>>>>
>>>>>>> 90 + 12 = 102 exactomundo
>>>>>>>
>>>>>>> to easy...
>>>>>>
>>>>>> Well, his Mom said I did not do the carry. So, shit!
>>>>>>
>>>>>>
>>>>>>> 71 * 82 ?   [5822]
>>>>>>
>>>>>> Nice!
>>>>>
>>>>> What about:
>>>>>
>>>>> 82*7*10 + 82*1*1 = 5822
>>>>>
>>>>> ;^)
>>>>
>>>> Therefore what about:
>>>>
>>>> (7*8*10+7*2*1)*10 + 82*1*1 = 5822
>>>>
>>>
>>> Getting close to final form would be:
>>>
>>> (7*8*10+7*2*1)*10+(1*8*10 + 1*2) = 5822
>>>
>>>
>>
>> redux to 7,2,1
>>
>> (7*(7+1)*(7+2+1))+(7+2+1))*(7+2+1)+(1*(7+1)*(7+2+1)+2*1)) =5822
>
> I think you have mismatched parentheses here:
>
> https://www.wolframalpha.com/input/?i=%287*%287%2B1%29*%287%2B2%2B1%29%29%2B%287%2B2%2B1%29%29*%287%2B2%2B1%29%2B%281*%287%2B1%29*%287%2B2%2B1%29%2B2*1%29%29
>
>
>>
>> (seems like the wrong way to go, aha! try Binary!)
>>
>> 1000111 * 1010010 = 1011010111110   (ugh, makes my eyes squirm)
>>
>> 1,000,111 * 1,010,010 = 1,011,010,111,110   (... perhaps QR code?)
>>
>
> ;^)

Darn! first mistake this year! your right, leading parenthetical missing

((7*(7+1)*(7+2+1)+(7*2*1))*(7+2+1)+(1*(7+1)*(7+2+1)+2*1)) =5822

It has just been discovered that research causes cancer in rats.

tech / sci.math / Re: Simple Multiplication...

Subject	Author
Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	FromTheRafters
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	FromTheRafters
Re: Simple Multiplication...	Sergio
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Sergio
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Sergio
Re: Simple Multiplication...	Eram semper recta
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Chris M. Thomasson
Re: Simple Multiplication...	Chris M. Thomasson