Education Technology

Crunching Numbers

Published on 06/09/2008

Activity Overview

Students learn to build and add two digit numbers. They connect number words and numerals.

Before the Activity

  • See the attached PDF file for detailed instructions for this activity
  • Print pages 33 - 44 from the attached PDF file for your class
  • During the Activity

    Distribute the page to the class.

    Follow the activity procedures:
    Activity A:

  • Show and read the Cheerios Counting Book to students


  • Activity B:
  • Pass out 100 Cheerios, cups, and place value mats
  • Call out a number
  • Students make the number and write the number on the mat
  • Using tens and ones, show how to add 2 digit numbers on the mat


  • Activity C:
  • Use the calculator to add 2-digit numbers
  • Identify the place value of the digits


  • Activity D:
  • Ask students to add some two-digit numbers with the help of Cheerios and re-grouping


  • Activity E:
  • Build and add 2-digit numbers with the help of the calculator
  • Write the numbers in place value language
  • After the Activity

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