Rima
Posts: 46
Karma: 40 Baby: 3
|
 |
« on: March 27, 2009, 09:17:48 PM » |
|
Did you know that? 1 x 8 + 1 = 9 12 x 8 + 2 = 98 123 x 8 + 3 = 987 1234 x 8 + 4 = 9876 12345 x 8 + 5 = 98765 123456 x 8 + 6 = 987654 1234567 x 8 + 7 = 9876543 12345678 x 8 + 8 = 98765432 123456789 x 8 + 9 = 987654321  |
|
|
|
|
Logged
|
|
|
|
Rima
Posts: 46
Karma: 40 Baby: 3
|
|
« Reply #1 on: March 27, 2009, 09:19:23 PM » |
|
Another one 1 x 9 + 2 = 11 12 x 9 + 3 = 111 123 x 9 + 4 = 1111 1234 x 9 + 5 = 11111 12345 x 9 + 6 = 111111 123456 x 9 + 7 = 1111111 1234567 x 9 + 8 = 11111111 12345678 x 9 + 9 = 111111111 123456789 x 9 +10= 1111111111  |
|
|
|
|
Logged
|
|
|
|
Rima
Posts: 46
Karma: 40 Baby: 3
|
|
« Reply #2 on: March 27, 2009, 09:20:44 PM » |
|
9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888
Brilliant isn't it?
|
|
|
|
|
Logged
|
|
|
|
Rima
Posts: 46
Karma: 40 Baby: 3
|
|
« Reply #3 on: March 27, 2009, 09:21:56 PM » |
|
Now look at this symmetry: 1 x 1 = 1 11 x 11 = 121 111 x 111 = 12321 1111 x 1111 = 1234321 11111 x 11111 = 123454321 111111 x 111111 = 12345654321 1111111 x 1111111 = 1234567654321 11111111 x 11111111 = 123456787654321 111111111 x 111111111=12345678987654321  |
|
|
|
|
Logged
|
|
|
|
|
Nikolett
|
|
« Reply #4 on: March 27, 2009, 09:25:43 PM » |
|
Brilliant, I've only seen the last one before! |
|
|
|
|
Logged
|
|
|
|
|
Ayesha Nicole
|
|
« Reply #5 on: March 27, 2009, 09:48:09 PM » |
|
Dear Rima, That is sooo cool! I am math-challenged because here in America, they teach you only ONE method to solve problems and it is the longest method. I began to enjoy simple math equations in my head after my husband explained some simple tricks that he learned. Being a visual learner - the equations you posted are very interesting to me. - Ayesha |
|
|
|
|
Logged
|
|
|
|
|
Nikolett
|
|
« Reply #6 on: March 27, 2009, 10:09:10 PM » |
|
Would you share your tricks, Ayesha?
|
|
|
|
|
Logged
|
|
|
|
|
|
rose08
Posts: 128
Karma: 115 Baby: 1+1P Latest: (Pg)819w 2d
|
|
« Reply #8 on: March 27, 2009, 11:50:49 PM » |
|
That is cool. I learned some tricks but not like that. This is mine: when you multiply 11 by a two digit number eg. 12 you take the two digits add them together (to get 3) then put that number in the middle of the first two (132)...simple huh.  11 x 10 = 120 11 x 11 = 121 11 x 12 = 132 11 x 13 = 143 11 x 14 = 154 11 x 15 = 165 11 x 16 = 176, etc... |
|
|
|
|
Logged
|
|
|
|
LongTallDrink
Posts: 150
Karma: 106 Baby: 1
BabyBeat
|
|
« Reply #9 on: March 28, 2009, 12:57:55 AM » |
|
Thanks Rima for the beautiful equations - they make me want to embrace something I've always if not feared, at least been uncomfortable with. And Ayesha for the link - if I'm going to raise myself a quantum physicist, I'm going to need all the help I can get...  |
|
|
|
|
Logged
|
|
|
|
Kyles Mom
Posts: 469
Karma: 215 Baby: 3 Latest: 9y 11m 2d
Trying to bring up Kyle as a stranger!
|
|
« Reply #10 on: March 28, 2009, 01:21:43 AM » |
|
i LOVE maths........ in school I am the only one doing math.... but its only cos I honestly enjoy doing math and it is not as difficult for me as its for my classmates........ but i have one problem, I cant teach it! I just see sums and understand it but its hard to explain, there are times i dont need to do the work but can just get the answer....... i dont know how or why or where I developed it!
but one thing, I hated calculators in school to do simple maths!
The simple 9 times is easy too
9 x 1 = 09
9 x 2 = 18
9 x 3 = 27
9 x 4 = 36
9 x 5 = 45
9 x 6 = 54
9 x 7 = 63
9 x 8 = 72
9 x 9 = 81
9 x 10 = 90
|
|
|
|
|
Logged
|
|
|
|
|
Nikolett
|
|
« Reply #11 on: March 28, 2009, 07:17:45 AM » |
|
Thanks, Ayesha, k Just to think about it, I am a math and physics teacher by education and knew less than third of those  I think doing equations "straightforward" way was overemphasized with us  |
|
|
|
|
Logged
|
|
|
|
|
|
|
Nikolett
|
|
« Reply #13 on: March 28, 2009, 09:07:29 PM » |
|
I am more than enjoying, I am thrilled, bookmarked it, followed some links and will play 21 game with my kids tomorrow! k again |
|
|
|
|
Logged
|
|
|
|
|
Danellie
|
|
« Reply #14 on: March 29, 2009, 03:42:30 AM » |
|
That's right Nikolett. I even teach Physics and Math too in college for a year. I studied Engineering for 5 years. Why do I only know 2 of those 6 sets of equations posted? |
|
|
|
« Last Edit: March 29, 2009, 03:46:06 AM by Danellie »
|
Logged
|
|
|
|
|
Digg
