The Singing Hedgehog Guide to:
Multiplication 3
Remember that zero is a dangerous number!
Here we have slightly changed the last example:
x h t u
x 2 0 9
x 4
As before, we times 4 by 9 (36) and write down 6 carry 3
x h t u
x2 0 9
x 4
x 1 6
x 3
Now - LOOK OUT! - 4 times 0 is nothing so just add the carry
x h t u
x2 0 9
x 4
x 3 6
x2 3
Finally we times 4 by 2 and write 8
x h t u
x2 0 9
x 4
1 8 3 6
x2 3
Now you need to practise:
downloadable worksheet
(save this file then run it)