Education Technology

# Activities

• ##### Subject Area

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

6-8

60 Minutes

• ##### Device
• TI-30X IIB
• TI-30X IIS
• TI-34 II Explorer Plus™
• ##### Other Materials
This is Activity 1 from the EXPLORATIONS Book:
Math Investigations with the TI-30X IIS and TI-34 II: Activities for the Middle Grades

The following materials are required for this activity:
• 3 X 5 cards

## Aim High, Aim Low

#### Activity Overview

Students will explore patterns related to place value in calculations.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print pages 5 - 8 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

Follow the activity procedures:

• Enter 5 single-digit numbers and use each digit once to create a problem containing a one-digit number multiplied by a four-digit number
• Interchange the digits and record the products each time
• Estimate the largest possible product for the problem
• Understand that the largest digits should be used in the largest place value positions to maximize the product
• Realize that the smallest digits should be used in the largest place value positions to minimize the product
• #### After the Activity

Students complete the Student Activity pages and list the largest and smallest possible answers for each combination of numbers.

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