# Activities

• • • ##### Subject Area

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

• ##### Author 6-8
9-12

60 Minutes

• ##### Device
• TI-73 Explorer™
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• TI-Navigator™

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
This is Activity 1 from the EXPLORATIONS Book:
Topics In Algebra 1

## Integers

#### Activity Overview

Students learn the definition of these terms: the sign of a number, numbers of opposite sign, and absolute value. They examine sets of positive and negative integers and zero. They also review ordering and additive inverse property, and learn addition, subtraction, multiplication, and division of integers.

#### Before the Activity

Install Topics in Algebra 1 (Chapters 1-4) App on the calculator using one of these two methods:

• TI Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable
• TI-Navigator™  "send to class" feature
• See the attached PDF file for detailed instructions for this activity
• Print pages 1-1 to 1-10 from the attached PDF file for your class
• #### During the Activity

Distribute the printed pages to the class.

• Given two objects on the positive and negative side of the y axis, find the distance between the objects
• Use multiplying, dividing, adding, and subtracting signed numbers to solve problems
• Solve problems to determine if the result is positive, negative, or zero
• Observe that the product of a positive and negative number is negative
• Understand that the product of two negative numbers is positive
• Observe that division rules use multiplication as the inverse operation
• Find the absolute value of a number