HAVE A BREAK

At break time at school or in the office try out this elegant way of multiplying numbers using a simple pattern.

**21 x 23 = 483**

This is normally called long multiplication but

actually the answer can be written straight down

using the VERTICALLY AND CROSSWISE

formula.

We first put, or imagine, 23 below 21

There are 3 steps:

a) Multiply**vertically on the left**: 2 x 2 =**4**

This gives the first figure of the answer.

b) Multiply**crosswise and add**: 2 x 3 + 1 x 2 =**8**

This gives the middle figure.

c) Multiply**vertically on the right**: 1 x 3 =**3**

This gives the last figure of the answer.

And thats all there is to it.

- Similarly
**61 x 31 = 1891** - 6 x 3 =
**18**; 6 x 1 + 1 x 3 =**9**; 1 x 1 =**1**

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Have A Break

The creative principle

resides in mathematics

resides in mathematics

EINSTEIN