SIGNS AND SYMBOLS

 $\times$  

• THE LETTER X

• MULTIPLY

• DIVIDE

 $\ne$  

• IS EAUAL TO

• IS NOT EQUAL TO

• CAN NOT BE SIMPLIFIED

{ }

• set of

• brackets

• grouping brackets

>

• more than

• less than

<

• more than

• less than

~

• is similar to

• is different to

 $\because$  

• therefore

• because

• and so on

 $\therefore$  

• therefore

• before

• and so on

 $\phi$  

• set of

• empty set

• not in set

 $\Sigma$  

• equation

• equal to

• sum of