Texas Instruments TI-83 PLUS - Manual (Page 40)

TI-83 Plus Operating the TI-83 Plus Silver Edition 37
You can use the variable Ans to represent the last answer in most places.
Press y Z to copy the variable name Ans to the cursor location. When
the expression is evaluated, the TI-83 Plus uses the value of Ans in the
calculation.
Calculate the area of a garden plot 1.7 meters by 4.2 meters. Then calculate the yield
per square meter if the plot produces a total of 147 tomatoes.
1 Л 7 ¯ 4 Л 2
Н
147 ¥ y Z
Í
Continuing an Expression
You can use Ans as the first entry in the next expression without entering
the value again or pressing y Z . On a blank line on the home
screen, enter the function. The TI-83 Plus pastes the variable name Ans
to the screen, then the function.
5 ¥ 2
Н
¯
9 Л 9
Н