**I. Menu Keys - Keys that offer
choices**

E. MATH and NUMThe NUM menu along with the MATH menu give you a wide variety of operations to work with.

You can see that there are many selections on these two menus that you will be able to use often.

NUM

1:abs( (absolute value) returns the absolute value of a number, expression, list, matrix, etc.

2:round( rounds a number, list, expression, etc. to a specified number of decimals (less than or equal to 9). If the number of decimals is not given, the default is 10 digits.

3:iPart( (integer part) returns the integer part of a number, expression, etc. and 4:fPart( (fractional part) returns the fractional part.

5:int( (greatest integer) returns the greatest integer less than or equal to the given value.

6: min( (minimum value) and 7:max( (maximum value) return the minimum value and maximum value in a list. These are also found in the LIST MATH menu.

8:lcm( (least common multiple) and 9:gcd( (greatest common divisor) will return the least common multiple and the greatest common divisor of two expressions that must both be or contain only non-negative integers.