@ : |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
---|---|---|---|---|---|---|---|---|---|---|---|

- - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | ||

0 | 0 | e | 3 | 2 | 1 |
||||||

1 | 0 | 1 | t | r | n | s |
|||||

2 | 0 | 2 | 4 | c | d | d | t |
||||

3 | 0 | 3 | 6 | 9 | |||||||

4 | 0 | 4 | 8 | 12 | 16 | ||||||

5 | 0 | 5 | 10 | 15 | 20 | 25 | |||||

6 | 0 | 6 | 12 | 18 | 24 | 30 | 36 | ||||

7 | 0 | 7 | 14 | 21 | 28 | 35 | 42 | 49 | |||

8 | 0 | 8 | 16 | 24 | 32 | 40 | 48 | 56 | 64 | ||

9 | 0 | 9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 |

Here's how to use the table**:** Always put the smaller number first. For example, 9 times 7 is equal to 7 times 9 (because of the *commutative* property of the real number system). Go to the 7 in the row at the top and look at the column that has this 7 at its top. Go to the 9 in the column at the left and look at the row that has this 9 at its left. The answer, 63, is in the cell which is the intersection of the just mentioned column and row. It is very important to be able to verify that you have the correct answer to any problem, and therefore the answer is a link to a page where you can verify the answer at a glance. I recommend verifying the "9" column first, since there's only one entry in that column. Then visit the "8" column followed by the "7" column and so on. These are the harder parts of the table, but they involve the fewest entries. Carry the table with you, refer to it when needed, and eventually you will know it by heart. And by the way, you can learn the bottom row instantly using the trick shown here.