Education Technology

# Activities

• ##### Subject Area

• Math: PreAlgebra: Number Sense and Operations

6-8

50 Minutes

• ##### Device
• TI-83
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• ##### Other Materials
This is Activity 1 from the EXPLORATIONS Book:
Graphing Calculator Activities for Enriching Middle School Mathematics

Estimation Games

#### Activity Overview

Students use the calculator to compute products of numbers and to find answers to division problems. The activity is designed to help students develop number sense with the operations of multiplication and division.

#### Key Steps

• The first game involves using the calculator to compute products of numbers. The goal is to be the team who finds a product that is between two given numbers (the Target Range) chosen by one team at the start of play.

• The second game involves using the calculator to compute answers to division problems. The goal is to be the team who causes the calculator display to show a quotient that is between two given numbers (the Target Range) chosen by one team at the start of play.

After students complete each game they will discuss the strategies they used to determine the factor or divisor.