If you don't know the multiplication table by heart,
then carry it with you and refer to it as needed.

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(c) Barry Davies 2013
x 2 3 4 5 6 7 8 9
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49
8 16 24 32 40 48 56 64
9 18 27 36 45 54 63 72 81
THE MORE POWERFUL TOOL

Calculators have made the times table obsolete?

We don't need our legs because we have cars.

4-function, scientific, and financial calculators are very
useful. However, they force every square root and
fraction into the roundedness of the decimal,
and this obstructs our understanding of numbers.

The human brain is the more powerful tool.
Imagine two hands with all
digits upright, and count the
digits left to right:
one to ten.

Lower the 7th digit,
and read the upright digits
as a number:
9 x 7 = 63

You have just learned
the 9 times table
The 9 Times Table
x 2 3 4 5 6 7 8 9
9 18 27 36 45 54 63 72 81
I realized recently that my most important work
of the past twenty years may have been simply to
take the time to understand. It's time the main stream
does not allow us to have, and I got it by leaving
said flow. The subject matters were classical tensor
analysis and the real number system.

It seems to me that this missing time, along with the
lack of resolution of other issues, suffices to explain why
so many people have so much trouble with mathematics.

I propose to the great and grand parents that we take
the time and then exert our influence in the stream.

¹ I learned this from a friend who attributed it to Jaime Escalante and the movie "Stand and Deliver" - google for more.