# Activities

• ##### Download

• • ##### Subject Area

• Math: Middle Grades Math: Number Sense
• Math: PreAlgebra: Number Sense and Operations

• ##### Author K-5

60 Minutes

• ##### Device
• TI-10
• TI-15 Explorer™
• ##### Other Materials
This is Activity 3 from the EXPLORATIONS Book:
Integrating Handheld Technology into the Elementary Mathematics Classroom .

The following calculators can also be used for this activity:
TI-108
MathMate™
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Number and Operation Sense: Rational Numbers

#### Activity Overview

Students learn to use the calculator to collect a set of data in order to identify patterns that illustrate important rational number concepts: the relationship between rational numbers and division, and equivalent fraction and decimal forms for rational numbers.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print pages 21 - 29 from the attached PDF file
• #### During the Activity

Distribute the pages to the class.

Follow the activity procedure:

• Choose a divisor to use with a variety of dividends
• Explore the different forms in which the quotient can be displayed on the calculator
• Make a chart to record each of the quotients in integer quotient with remainder form, non-simplified fraction form, simplified fraction form, mixed number form, and decimal form
• Organize the information in the chart by ordering the dividends and look for patterns
• Write down three patterns seen in the chart to share and discuss
• Make a conjecture based on that pattern and then use the calculator to test the conjecture
• Try several dividends with a given divisor and then try the same set of dividends with another divisor
• Support or disapprove statements related to rational numbers and operations
• Use other elementary school activities to develop an understanding of rational numbers and rational number operations
• #### After the Activity

Review students results and re-teach concepts as necessary.