Thursday, October 17, 2013

Why are some times tables harder than others? | Life and style | The Guardian

Why are some times tables harder than others? | Life and style | The Guardian

WelshmanEC2

7 4 1
8 5 2
9 6 3
That's how I visualised the 7 x table. Job done.
There's always patterns. At least, there are for me, I see things in numbers and I see numbers in everything. It's a blessing and a curse, but it makes the times-tables a breeze.
The digits in that table, read as rows, show the last digits of each multiple of 7 up to 9 (after 10 it repeats). And the grid itself is simplicity itself to construct, even in your head.
It took me a while to interpret it too!

WelshmanEC2 biseig

I'll try - not easy to explain, it's just something I "see" without thinking.

Look on it as two grids, representing the multiples of 7
First grid is the first digit of each multiple
Second grid is the second
0 1 2
2 3 4
4 5 6
and
7 4 1
8 5 2
9 6 3
1 x 7 = first number in each grid = 0 & 7 = 7
2 x 7 = second number in each grid = 1 & 4 = 14
and so on.

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