Using ¹ And Ì - Texas Instruments TI-82 STATS Getting Started

Using ¹ and Ì
Many calculators (including the TI-82 STATS) make a distinction
between the symbols for subtraction and negation.
Use ¹ to enter subtraction operations. Use Ì to enter a negative
number in an operation, in an expression, or on a setup screen.
Example: Subtract 10 from 25.
Press
2 5 ¹ 1 0
Í
Add 10 to L25.
Example:
Press
Ì 2 5 Ã 1 0
Í
Result
Result
15