We have to calculate 436*54. We can write one number as the top row of a table as shown and the other number as the first column. We multiply an element in a row by an element in a column to get that element in the table.
|
* |
400 |
30 |
6 |
|
50 |
20000 |
1500 |
300 |
|
4 |
1600 |
120 |
24 |
To find the element in the 3 rd row 3 rd column (shown in blue) we multiply 4 in the 3 rd row by 30 in the 3 rd column.
Then we add up all the answers in the table. We obtain:20000+1500+300+1600+120+24=23544.
Example: Find 456*24
|
* |
400 |
50 |
6 |
|
20 |
8000 |
1000 |
120 |
|
4 |
1600 |
200 |
24 |
Then we add up all the answers in the table. We obtain 8000+1000+120+1500+200+24=10944