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Q&A #1512


Multiplication table

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From: Gail (for Teacher2Teacher Service)
Date: May 01, 1999 at 17:22:44
Subject: Re: Multiplication table

This is not really a "trick". Have you had your student look carefully at the
products that occur when you are using the one digit factors (1X1 through
9X9)? There are several patterns to be found, and many relationships between
the products themselves.

For instance, if she knows the twos, the fours and twice as much. The same
with the three and sixes, and the fours and eights.

If you have not already done this, make a 10 by 10 grid. Above the grid put
the numbers 0 through 9, and do the same down the left side.

Your student should find a cell (one "square" in the grid), and then multiple
the factor at the end of that row with the one at the top of that column.

When the grid is finished, have her look for patterns in the grid. She may
want to color all the like products the same color, or she may want to shade
all the evens, or all the odds.

You might want to "help" her notice what happens to the size of the
products as you move around in the grid. Are they larger if you move
in a certain direction? Is there any way to predict where the largest
products will be found? She will find some surprises, and they will help her
understand mulitplication, and remember the products.

 -Gail, for the Teacher2Teacher service

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