# Activities

• ##### Download

• • ##### Subject Area

• Math: Elementary Math: Algebraic Thinking
• Math: Elementary Math: Number Sense and Estimation

• ##### Author K-5

60 Minutes

• ##### Device
• TI-10
• TI-15 Explorer™
• ##### Other Materials
This activity originally appeared in the EXPLORATIONS Book:
Uncovering Math with Manipulatives, the TI-10, and the TI-15 Explorer

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The Mysterious Constant

#### Activity Overview

Students investigate a pattern using the constant function on the calculator, record the ordered pairs in a table, describe the pattern, and predict what will come next.

#### Objectives

Students will explore the following concepts in this activity:

• whole numbers
• addition
• comparing numbers
• multiplication
• estimation
• functions

#### About the Lesson

Distribute the student activity page to the class. Students will play the game in groups of two:

• Student 1 enters a constant function (hidden) and a starting number on the calculator
• Student 2 repeats operation with the constant function several times, records the resulting values in a table, studies the pattern, guesses the constant function, and predicts what will come next in the pattern
• Students try to predict the number that would be displayed on the 95th use of the constant function. Have students switch roles, and repeat the activity with a different constant function.