Students will use the two constant operations to compare the results of different mathematical procedures and determine how they are related.

Have students program the first constant operation with +2 and the second constant operation with -2.

Have students enter 8 on their calculators, press the first constant operation key, and read the output (1 10, which means adding 2 once to 8 gives 10).

Have students press the second constant operation key to apply the second constant operation to the output of the first constant operation, and then read the output (1 8, which means subtracting 2 once from 10 gives 8).