multiplying integers

                                  Integers

Hi,

Today we are going to talk about integers. Integers are numbers that are positive and negative.  Multiplying them is just the same as multiplying regular numbers. Here is a chart that can help you.

  

p	n	n
n	p	n
n	n	p

key:  p= positive  n= negative

In this table, you read from right to left, downwards, or diagonal. So lets look at the first row across.

p x n =n 

The first column downwards is a similar math operation.

p x n = n

Going diagonal  

p x p = p

The bottom row 

n x n = p

The rest, if you go in any direction, will be one of the above operation.

Lets do an example.9(-11). First lets see if the answer is positive or negative. So the problem on the table would be,p x n =n. So the answer is negative. Now it is simple multiplication. 9 x 11=99. So the answer is -99.