@CoreyWhite: "I'm studying  this simple number table this morning, after I  had some
crazy dreams last night that went on and on.  I didn't get to sleep
until 3:00AM or later, and I am waking up now after 3:00PM.  Some of
the best dreams though.
I'm wondering what you call this sort of number table:
12 345 67 89
24 681012141618
36-916-18-212427
48-122024283236
51015-30354045
6-18-4254
7-21-4963
8-24-5672
9-27-6381
1030-70-90
Up until now I've only been very good at counting by 1's , 2's, 4's,
5's, 6's mostly.
Now I'm learing to count by 3's, 7's, 8's, & 9's.. This is going to
really help with the arithmetic.  Learning the table forwards and
backwards & not just counting it will really speed things up.  But I
can't be the first person to invent this can I???"
    @jankrihau: "Disregarding that 16 and 20 seem to be in the wrong place, this looks
a lot like a multiplication table that most of us learned in
elementary school.
-
J K Haugland
<url>"
    @CoreyWhite: "<quote>
Ooh, foobar.  My table was messed up.. But I fixed it now:
12 345 67 89
24 681012141618
36-9-1218-212427
48-121624283236
5101520-30354045
6-184254
7-214963
8-245672
9-276381
1030-7090"
    @CoreyWhite: "<quote>
I got a new table for you that does subtraction:
  (0)    20 19  18 17 16 15 14  13 12 11 10
  (1)    19 18  17 16 15 14 13  12 11 10  9
  (2)    18 17  16 15 14 13 12  11 10  9   8
 ( 3)    17 16  15 14 13 12 11 10   9   8   7
 ( 4)    16 15  14 13 12 11 10  9    8   7   6
 ( 5)    15 14 13 12 11  10  9   8    7   6   5
 ( 6)    14 13 12 11 10   9   8   7    6   5   4
 ( 7)    13 12 11 10  9    8   7   6    5   4   3
 ( 8)    12 11 10  9   8    7   6   5    4   3   2
 ( 9)    11 10  9   8   7    6   5   4    3   2   1
(10)   10   9   8   7   6    5   4   3    2   1   0
(11)     9   8   7   6   5    4   3   2    1   0
(12)     8   7   6   5   4    3   2   1    0
(13)     7   6   5   4   3    2   1   0
(14)     6   5   4   3   2    1   0
(15)     5   4   3   2   1    0
(16)     4   3   2   1   0
(17)     3   2   1   0
(18)     2   1   0
(19)     1   0
(20)     0
Just follow any number over to where it clears out at zero, and count
up the row to do subraction by moving over to the initial collum."
    @aine_nicneven: "<quote>
I have seen something like that before. I can't remember where from.
Not school, something else. Argh .."
    @virtualadepts: "'m working on these simple math tables to learn arithmetic.  While
I'm working on them an idea keeps popping in my head.. "What is the
matrix?".
The math tables I find online are all but useless for  really helping
anyone learn, and  they don't teach the math matrix in schools.  They
expect everyone to rely on calculators.
But here is a good way to do it:
  (0)    20 19  18 17 16 15 14  13 12 11 10 9  8  7  6  5  4  3  2  1
0
  (1)    19 18  17 16 15 14 13  12 11 10  9  8  7  6  5  4  3  2  1  0
  (2)    18 17  16 15 14 13 12  11 10  9   8  7  6  5  4  3  2  1  0
 ( 3)    17 16  15 14 13 12 11 10   9   8   7  6  5  4  3  2  1  0
 ( 4)    16 15  14 13 12 11 10  9    8   7   6  5  4  3  2  1  0
 ( 5)    15 14 13 12 11  10  9   8    7   6   5  4  3  2  1  0
 ( 6)    14 13 12 11 10   9   8   7    6   5   4  3  2  1  0
 ( 7)    13 12 11 10  9    8   7   6    5   4   3  2  1  0
 ( 8)    12 11 10  9   8    7   6   5    4   3   2  1  0
 ( 9)    11 10  9   8   7    6   5   4    3   2   1  0
(10)   10   9   8   7   6    5   4   3    2   1   0
(11)     9   8   7   6   5    4   3   2    1   0
(12)     8   7   6   5   4    3   2   1    0
(13)     7   6   5   4   3    2   1   0
(14)     6   5   4   3   2    1   0
(15)     5   4   3   2   1    0
(16)     4   3   2   1   0
(17)     3   2   1   0
(18)     2   1   0
(19)     1   0
(20)     0
This is a simple subtraction table for arithmetic.  Normally addition
and subtraction tables are useless because they make such a simple
pattern it is hard to visualize what is happening.  This one is easier
to learn from.  You just start by picking a number to subtract from,
in the parenthesis.  Let's say (17), then you move over to the 0 in
that row, and ask yourself how much you are subtracting.  Then you
just go straight up the row to that number, and over again to the
parenthesis to get your answer.   This is great visual mathematics.
Here are my multiplication and division tables which are also great,
because they only are carried on until the pattern repeats and you
don't have to learn the table for very large numbers.  This is just
the basics, because you can do long division and everything so simply
you don't need to know the answer for very large numbers.
12 345 67 89
24 681012141618
36-9-1218-212427
48-121624283236
5101520-30354045
6-184254
7-214963
8-245672
9-276381
1030-7090"
    @virtualadepts: "<quote>
same post with courier font:
I'm working on these simple math tables to learn arithmetic.  While
I'm working on them an idea keeps popping in my head.. "What is the
matrix?".
The math tables I find online are all but useless for  really helping
anyone learn, and  they don't teach the math matrix in schools.  They
expect everyone to rely on calculators.
But here is a good way to do it:
  (0)    20 19 18 17 16 15 14  13 12 11 10 9  8  7  6  5  4  3  2  1
0
  (1)    19 18 17 16 15 14 13  12 11 10  9 8  7  6  5  4  3  2  1  0
  (2)    18 17 16 15 14 13 12  11 10  9  8 7  6  5  4  3  2  1  0
 ( 3)    17 16 15 14 13 12 11  10  9  8  7 6  5  4  3  2  1  0
 ( 4)    16 15 14 13 12 11 10   9  8  7  6 5  4  3  2  1  0
 ( 5)    15 14 13 12 11 10  9   8  7  6  5 4  3  2  1  0
 ( 6)    14 13 12 11 10  9  8   7  6  5  4 3  2  1  0
 ( 7)    13 12 11 10  9  8  7   6  5  4  3 2  1  0
 ( 8)    12 11 10  9  8  7  6   5  4  3  2 1  0
 ( 9)    11 10  9  8  7  6  5   4  3  2  1 0
 (10)    10  9  8  7  6  5  4   3  2  1  0
 (11)     9  8  7  6  5  4  3   2  1  0
 (12)     8  7  6  5  4  3  2   1  0
 (13)     7  6  5  4  3  2  1   0
 (14)     6  5  4  3  2  1  0
 (15)     5  4  3  2  1  0
 (16)     4  3  2  1  0
 (17)     3  2  1  0
 (18)     2  1  0
 (19)     1  0
 (20)     0
This is a simple subtraction table for arithmetic.  Normally addition
and subtraction tables are useless because they make such a simple
pattern it is hard to visualize what is happening.  This one is easier
to learn from.  You just start by picking a number to subtract from,
in the parenthesis.  Let's say (17), then you move over to the 0 in
that row, and ask yourself how much you are subtracting.  Then you
just go straight up the row to that number, and over again to the
parenthesis to get your answer.   This is great visual mathematics.
Here are my multiplication and division tables which are also great,
because they only are carried on until the pattern repeats and you
don't have to learn the table for very large numbers.  This is just
the basics, because you can do long division and everything so simply
you don't need to know the answer for very large numbers.
12 345 67 89
24 681012-141618
36-9-1218-212427
48-121624-283236
510152030-354045
618-4254
721-4963
824-5672
927-6381
10-3070-90"
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