1-16 Operating the TI-80
When an expression is evaluated successfully from the Home screen or from a
program, the TI.80 stores the answer to a variable, ANS (Last Answer). ANS may
be a decimal number, a fraction, or a list. When you turn the TI.80 off, the value
in ANS is retained in memory.
You can use the variable ANS to represent the last answer in
most places. When you press y ±, the variable name ANS
is copied to the cursor location. When the expression is
evaluated, the TI-80 uses the value of ANS in the calculation.
Calculate the area of a garden plot that is 1.7 meters by 4.2
meters. Then calculate the yield per square meter if the plot
produces a total of 147 tomatoes.
1.7 p 4.2
¸
147 e y ±
¸
You can use the value in ANS as the first entry in the next
expression without entering the value again or pressing y
±. On a blank line on the Home screen, enter the function.
The TI-80 “types” the variable name ANS followed by the
function.
5 e 2
¸
p 9.9
¸
To store an answer, store ANS to a variable before you
evaluate another expression.
Calculate the area of a circle of radius 5 meters. Then
calculate the volume of a cylinder of radius 5 meters and
height 3.3 meters. Store the result in the variable V.
y T 5 a
¸
p 3.3
¸
§ ? V
¸
Last Answer
Using Last
Answer (ANS) in
an Expression
Continuing an
Expression
Storing Answers