The Singing Hedgehog Guide to:
Multiplication 1
The most important fact to remember is:
Multiplication works horizontally
Here is an example to show this:
x
t u
x
4
5
x 3
First we times 3 by
5
(15) and write down 5 carry 1
x
t u
x
4
5
x 3
x
1
5
x
1
Then we times 3 by
4
(12) add the carry and write 13
x
t u
x
4
5
x 3
x
1
3
5
x
1
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