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- February 18, 2013 at 7:09 pm #345144

AnonymousThis guy basically says he dosen't know multiplication table on memory and yet he has PhD in math. Wth. http://lemire.me/blog/archives/2008/07/07/i-still-dont-have-the-multiplication-tables-memorized/

Well anyway i am not mathematician and i do sux at multiplication table. I am not gonna lie the fact is i never tried learning it and i guess this is downturn for me since i am not quick at answering resoult on my own. It's totally embarising but fact is fact. I have decided to learn it on memory now. One more thing, for example i guess answer for 6 x 4 faster than 4 x 6 altho its the same s*hit LuLz.

February 19, 2013 at 12:46 am #412617

AnonymousI doubt this guy is for real. He probably wouldn't be able to calculate all the problems in his exams if he didn't knew 10×10 multiplication table by heart.

Anyway Povhec, since you don't know multiplication table how do you go shopping in market? You take calculator with yourself or you just trust the traders?

February 19, 2013 at 1:30 am #412618

AnonymousI don't have anything on the multiplication table memorized past 5. You just break down the numbers and square roots to do multiplications past the axis of 5.

For instance, if we wanted 9 x 9. I would just do 9 x 3(^2). 9 x 3 = 27. Break down 27 into 20 + 7. (20+7) x 3. 20 x 3 = 60. 7 x 3 = 21. 60 + 21 = 81.Which is the samething as 9 x 9 = 81.

Would my life be easier if I memorized everything from 10 x 10? Yes ~ but someone can say why not memorize 20 x 20 or 200 x 200? Ditto ~ you learn this sort of math so you can do infinite calculations. There's more to Math than just memorizing everything like a Monkey.

February 19, 2013 at 3:29 am #412619

AnonymousThe only math I'm good at is the math in casino gaming. Only because I was a craps dealer in Las Vegas for seven years.

February 19, 2013 at 3:51 am #412620

AnonymousQuote:I don't have anything on the multiplication table memorized past 5. You just break down the numbers and square roots to do multiplications past the axis of 5.

For instance, if we wanted 9 x 9. I would just do 9 x 3(^2). 9 x 3 = 27. Break down 27 into 20 + 7. (20+7) x 3. 20 x 3 = 60. 7 x 3 = 21. 60 + 21 = 81.Which is the samething as 9 x 9 = 81.

Would my life be easier if I memorized everything from 10 x 10? Yes ~ but someone can say why not memorize 20 x 20 or 200 x 200? Ditto ~ you learn this sort of math so you can do infinite calculations. There's more to Math than just memorizing everything like a Monkey.

So what do you do when you want to divide, you break up the number as well

Funny thing is in ancient times people used sexagesimal numeral system with ease and today people can't do basic operation with way easier decimal system

February 19, 2013 at 4:26 am #412621

AnonymousQuote:So what do you do when you want to divide, you break up the number as wellNope – no easy shortcuts for 81 / 9. Would still use the power of 2, though. 81 / 3(^2) is 81 / 3 = 27, 27/3 = 9. Samething as memorizing 81 / 9 = 9.

February 19, 2013 at 4:27 am #412622

AnonymousQuote:Nope – no easy shortcuts for 81 / 9. Would still use the power of 2, though. 81 / 3(^2) is 81 / 3 = 27, 27/3 = 9. Samething as memorizing 81 / 9 = 9.Disaster

February 19, 2013 at 8:01 am #412623

AnonymousQuote:The only math I'm good at is the math in casino gaming. Only because I was a craps dealer in Las Vegas for seven years.what do you play? are you banned from playing anywhere? what are the restrictions whle employed @ vegas casino?

February 19, 2013 at 9:49 am #412624

AnonymousYou don't really need to know it off by heart. You can easily work it out, it'll just take you a couple of extra seconds.

February 19, 2013 at 9:55 am #412625

AnonymousQuote:This guy basically says he dosen't know multiplication table on memory and yet he has PhD in math. Wth. http://lemire.me/blog/archives/2008/07/07/i-still-dont-have-the-multiplication-tables-memorized/Well anyway i am not mathematician and i do sux at multiplication table. I am not gonna lie the fact is i never tried learning it and i guess this is downturn for me since i am not quick at answering resoult on my own. It's totally embarising but fact is fact. I have decided to learn it on memory now. One more thing, for example i guess answer for 6 x 4 faster than 4 x 6 altho its the same s*hit LuLz.

Not the only one. I had memorised it but I need quite some time to recall the result. Anyway, I never bothered with that since we are allowed to use calculators in school for maths and physics. But I see a point in the article. What's the good if you're able to do a irational equation but fail at a simple intersectional calculation.

February 19, 2013 at 11:57 am #412626

AnonymousQuote:I doubt this guy is for real. He probably wouldn't be able to calculate all the problems in his exams if he didn't knew 10×10 multiplication table by heart.He claims he dose it by "cauculating" on his own instead of pure memory but yeah i am sceptical too.

Quote:Anyway Povhec, since you don't know multiplication table how do you go shopping in market? You take calculator with yourself or you just trust the traders?Well i either do "calculation" on myself in my mind which takes me quite some time or i just simply trust traders so i always take an account with myself just in case. Most often i make cauculation and prepare my money before i go to seller. Talking about that i always make sure every single cent i have is wisely spent. So if product is 6,47 € i will give precisely that amount of money.

Altho i often use automatic seller. Those new machines where you do everything yourself when buying. They are birlliant. Anyway multiplications like 10×10 are no problem. I got screwed up when i need to "cauculate" fast those variants like 6 x 8, etc.

Quote:Not the only one. I had memorised it but I need quite some time to recall the result. Anyway,**I never bothered with that since we are allowed to use calculators in school for maths and physics.**But I see a point in the article. What's the good if you're able to do a irational equation but fail at a simple intersectional calculation.LOL yeah in school i did that all the time.

Quote:You don't really need to know it off by heart. You can easily work it out, it'll just take you a couple of extra seconds.Sometimes it takes me extra awful alot of sec's.

February 19, 2013 at 12:23 pm #412627

AnonymousQuote:LOL yeah in school i did that all the time.They even watch you weird if you have no calculator at physics class. In maths it depends on the theme though…

Yeah, those sellers can be real b***** and pull you over the table.

February 19, 2013 at 4:37 pm #412628

AnonymousQuote:He claims he dose it by "cauculating" on his own instead of pure memory but yeah i am sceptical too.Well i either do "calculation" on myself in my mind which takes me quite some time or i just simply trust traders so i always take an account with myself just in case. Most often i make cauculation and prepare my money before i go to seller. Talking about that i always make sure every single cent i have is wisely spent. So if product is 6,47 € i will give precisely that amount of money.

Altho i often use automatic seller. Those new machines where you do everything yourself when buying. They are birlliant. Anyway multiplications like 10×10 are no problem.

**I got screwed up when i need to "cauculate" fast those variants like 6 x 8**, etc.LOL yeah in school i did that all the time.

Sometimes it takes me extra awful alot of sec's.

There's an easy way to calculate it if you're ever get stuck or confused. Taking your example 6 x 8 = 6 x (10 – 2) = 6 x 10 – 6 x 2 = 60 – 12 = 48 , and the good part is you don't need a paper or calculator, you can calculate it in your head.

Oh, and about the calculators I was never allowed to used them in mathematics classes, except for two mathematical subjects in university where you really can't do anything without calculator

February 19, 2013 at 5:26 pm #412629

AnonymousQuote:There's an easy way to calculate it if you're ever get stuck or confused. Taking your example 6 x 8 = 6 x (10 – 2) = 6 x 10 – 6 x 2 = 60 – 12 = 48 , and the good part is you don't need a paper or calculator, you can calculate it in your head.Let me meditate on this.

Quote:Oh, and about the calculators I was never allowed to used them in mathematics classes, except for two mathematical subjects in university where you really can't do anything without calculatorIn basic school we weren't allowed either but in high school we were allowed.

February 19, 2013 at 5:36 pm #412630

AnonymousQuote:In basic school we weren't allowed either but in high school we were allowed.😮 We could use calculators home only

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