They have numbers across the top and down the left side so that by checking where the two rows intersect, you have the product of the two numbers.
Example (using periods to keep the numbers properly spaced):
x_1__2__3__4__5__6
1| 1....2....3....4....5.....6
2| 2....4....6....8...10...12
3| 3....6....9...12..15...18
4| 4....8...12...16..20...24
5| 5...10..15...20..25...30
6| 6...12..18...24..30...36
To find the product of 2 x 5, follow the row with 2 across to the column with 5 to find that the result is 10.
Learn your multiplication tables
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While the multiplication tables are sometimes attributed to Pythagoras the oldest known multiplication tables were used by the Babylonians about 4000 years ago. These used a base of 60. The oldest known tables using a base of 10 are the Chinese decimal multiplication tables on bamboo strips dating to about 305 BC, during China's Warring States period.
When I was growing up, we had to memorize the full set of multiplication tables from 1 to 12. Multiplication Tables are standard 1 to 12 (not 1 to 100). Students must learn the times tables for 1 to 12, before they can apply those tables for 13 through to any number.You can find Multiplication Tables 1-12 online or as charts for sale. Or, do what we did as kids: make your own chart and color or decorate the chart.
time tables
It isn't necessary, nor particularly useful. Once you know the multiplication tables for one-digit numbers, you can do multiplication on paper for larger numbers. The time spent to memorize such multiplication tables for larger numbers would be better spent learning more advanced math concepts.
Very carefully.
Multiplication tables
Even
Because he knew His Tables! :)
E. B. Varian has written: 'Varian's commercial multiplication tables' -- subject(s): Multiplication, Ready-reckoners, Tables
There are many tricks to learning multiplication tables. One is the rhyme '8 times 8 fell on the floor and when it woke up it was 64'. Another is to know that all the nine multiplication tables add up to 9 up to 9 times 10.