# Activities

• ##### Download

• • ##### Subject Area

• Math: Elementary Math: Algebraic Thinking
• Math: Elementary Math: Number Operations

• ##### Author K-5

60 Minutes

• ##### Device
• TI-10
• TI-15 Explorer™
• ##### Other Materials
This is Activity 7 from the EXPLORATIONS Book:
Uncovering Math with Manipulatives, the TI-10, and the TI-15 Explorer

The following material is required for this activity:
• Pencils

## Names for 100

#### Activity Overview

Students will use the calculator to carry out operations of addition, subtraction, division, and multiplication on integers, fractions, and decimals to find mathematical expressions that equal 100.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print student activity sheet page 31 from the attached PDF file for your class
• #### During the Activity

Distribute the page to the class.

Follow the activity procedures:

• Express 6 in several different ways - using different situations, whole numbers, addition, multiplication, and division
• Find different expressions that total to 100
• Use a calculator to record as many expressions as possible that total to 100
• Compare the expressions and separate them into categories
• Find operations used
• Select one category and write more expressions that fit that category
• Describe a real-life situation for one category
• #### After the Activity

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