/sci/ - Science & Math

>>8140557
the first one is neat, the following lines, however, are less impressive - and you should be able to see why..

>>8140563

I SEE WHY

NAO EXPLAIN THE FIRST ONE

>>8140568
12345679*9 = 12345679*10 - 12345679

>>8140557
Hmm, good post OP. I suck at math but let me think for a second...

9 x 2 = 18
9 x 3 = 27

First number is larger by one than the previous one, the second one is smaller by one than previous one.

9x9 gives us (8)1 - we write one down and carry over 8

7x9 gives us (6+1)[3 + 8] - we write one down and carry over 7

See why those are similar? We simply remove the value we have to subtract by one and then add one to the value we have to add, so the equation always ends in one EXCEPT for cases where second number results in 0 - this case is with 8, hence it is excluded from the multiplicand. 0 is known to be a frequent exception from mathematical rules so it's not surprising.

18 is simply 9x2 so the result of multiplication will simply be two times larger, and so it goes for 27(9x3), 36(9x4), et cetera.

Do you get me?

retards, retards everywhere

123456789 has 9 numbers

123456789x9 cant = a number with 9 numbers, it has to equal the numbers total, so it would be 10

in other words 11111 11111 shitbirds

how does 123456789 (9) x 9 (1) = 111111111 (9)

>>8140580
Neat

>>8140613
>123456789 (9) x 9 (1) = 111111111 (9)
but that's wrong dipshit

>>8140580
thanks anon

>>8140557
[math]\frac{1}{9} = 0.\overline{1}[/math]
[math]\frac{11}{9} = \frac{10}{9} + \frac{1}{9} = 1.\overline{1} + 0.\overline{1} = 1.\overline{2}[/math]
[math]\frac{1111}{9} = \frac{1100}{9} + \frac{11}{9} = 122.\overline{2} + 1.\overline{2} = 123.\overline{4}[/math]
[math]\frac{11111111}{9} = \frac{11110000}{9} + \frac{1111}{9} = 1234444.\overline{4} + 123.\overline{4} = 1234567.\overline{8}[/math]
[math]\frac{111111111}{9} = \frac{111111110}{9} + \frac{1}{9} = 12345678.\overline{8} + 0.\overline{1} = 12345678.\overline{9}[/math]

Report frogposters.

>>8140590
Retard detected

9*9 = 81
7*9 = 63 + 8 = 71

and so on....

>>8140580
Based explanation

>>8140580

nice, much shorter than what I was going to post

>>8140580
nice

>>8140580
(-1/12)/10

>>8140568
>nao
>frogposting
>CRUISE CONTROL

Well, this explains a lot about the people who post frogs...they're underage.

>>8140590
or you could just have said
12345679 x 18 = 12345679 x 9 + 123456789 x 9

>>8140568

just try multiplying it by hand