Math Teacher. . Why void never taught me this?. most kids figure it out for themselves
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Math Teacher

Why void never
taught me this?
...
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Views: 8619
Favorited: 15
Submitted: 10/19/2013
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Comments(46):

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User avatar #2 - MrMustacho (10/19/2013) [-]
most kids figure it out for themselves
User avatar #4 - jacencaedus ONLINE (10/19/2013) [-]
there's also the trick of adding the digits together and they equal 9
User avatar #8 - astraea (10/19/2013) [+] (1 reply)
wasnt that like, obvious?
User avatar #33 - candymankill (10/20/2013) [+] (1 reply)
How the **** did you not notice that before
User avatar #26 - longbowjohnson (10/20/2013) [+] (2 replies)
I'd always multiply by 10 then subtract the number I should've multiplied by 9.
#17 - slandersalamander (10/20/2013) [+] (2 replies)
Because you shouldn't have needed to be taught that, unless you have some sort of mental deficiency.
User avatar #7 - beasert (10/19/2013) [-]
Mine taught me that.
#14 - bronzestop (10/20/2013) [-]
learned this on my own 2 or 3rd grade.
#10 - kennyh (10/19/2013) [-]
Schoolhouse Rock bitch
User avatar #9 - ncg (10/19/2013) [+] (3 replies)
And the two numbers always add up to nine.
1x9=09 0+9=9
2x9=18 1+8=9
3x9=27 2+7=9
4x9=36 3+6=9
etc
User avatar #32 - Nahyon ONLINE (10/20/2013) [-]
Because it's ******* obvious
User avatar #13 - freespeech (10/20/2013) [-]
you mean to tell me you didn't get that?
#46 - bobbysnobby (10/25/2013) [-]
This one is obvious but the trick i taught my self in like what 4th-5th grade for the times tables was for 6s was that you take half of your multiplier as your first digit and then your multiplier as your second digit. The system starts to mess up in double digits where its easier to memorize than use the system but as a young child It made things easier

6x2= 2/2 2,12
6x3 =3/2 1.5 5+3= 18
6x4=4/2 4= 24

User avatar #44 - frostinius (10/20/2013) [-]
Also, add the digits together.
18 1+8=9
27 2+7=9
36 3+6=9
45 4+5=9
etc.
#42 - nchubz (10/20/2013) [-]
i thought everyone just did +10 -1
also
all adding both digits together = 9
User avatar #41 - tvfreakuk (10/20/2013) [-]
I think I learned this from Dexter's Laboratory....
Pretty sure... But was probably another cartoon that I can't remember.
0
#39 - gmanofwonder has deleted their comment [-]
User avatar #16 - allthekingsanons (10/20/2013) [-]
because its not that hard
adding 9 is the same as adding 10 and subtracting 1
User avatar #12 - redrex (10/20/2013) [-]
why you never learned this on your own? it's pretty damn obvious
User avatar #6 - athojew ONLINE (10/19/2013) [-]
Because everyone figured it out for theme selves
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