Education Technology

# Activities

• ##### Subject Area

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

6-8

60 Minutes

• ##### Device
• TI-73 Explorer™
• ##### Other Materials
This is Activity 1 from the EXPLORATIONS Book:
Discovering Mathematics with the TI-73: Activities for Grades 5 and 6

The following materials are required for this activity:
• Several large card stock pieces
• 10 small houses numbered 1 through 10
• Rubber stamp and stamp pad

## What's Your Address?

#### Activity Overview

In this activity, students use the number 4 and the order of operations to find combinations that will result in numbers 1 to 10.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print pages 1 - 3 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

• Use the number 4 and addition, subtraction, multiplication, and division operations to find expressions whose results are all numbers from 1 to 10
• Record the order of operations required to arrive at an answer
• Reward expressions that use only four 4's
• Repeat the activity for another number
• Repeat the activity using three operations
• #### After the Activity

Students complete the Student Activity sheet.

Review student results:

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