# Activities

• • • ##### Subject Area

• Math: Elementary Math: Probability, Statistics and Data Analysis

• ##### Author K-5

60 Minutes

• ##### Device
• TI-10
• TI-15 Explorer™
• ##### Other Materials
This is Activity 24 from the EXPLORATIONS Book:
Uncovering Math with Manipulatives, the TI-10, and the TI-15 Explorer

The following materials are required for this activity:
• Class graph
• Number cubes
• Pencils and markers

Number Cube Sums

#### Activity Overview

Students explore experimental probability and patterns in fractions, decimals, and percents by rolling two number cubes and recording and analyzing the sums that come up.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print student activity sheet page 118 from the attached PDF for your class
• #### During the Activity

Distribute the page to the class.

• Determine the number of different sums possible if you roll the number cubes and add the numbers that come up together
• Verify the suggested number of sums by analyzing the possible combinations that can be made with the numbers on two different number cubes
• Predict which sum will come up the most if the number cubes are rolled a large number of times
• Have all students roll the number cubes 50 times and tally the sums that occur
• Have them record their results in fraction, decimal, and percent form
• Analyze the results and decide whether to revise the predictions concerning which sum will come up most often
• Ask each student to record his or her results on a class graph in which each tally represents more than one piece of data
• Record the class results using fraction, decimal, and percent representations
• Analyze the patterns in the results
• #### After the Activity

• Review student results
• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary