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Decimals - Overview of Decimal Formation
Grade: 3-5
Subject(s): Counting
Required products: Tool Factory Word Processor
  • Computer
  • LCD Projector or TV
  • Student Classwork Sheet
  • Markers
  • Power Point
  • Overview
    Students will be able to identify what a decimal is, and how to formulate decimals.
    1) Have students sit on the carpet where they can see the computer screen/LCD projector screen/TV
    2) Bring up the Power Point called "What is a Decimal?"
    3) Walk through the Power Point with the students and stop along the way for questions and descriptions of the concepts.
    4) After you have gone through the PowerPoint with the students, give them a short break, and send them back to their desks.
    5) Hand out blank sheets and markers to each student. Tell them that they are going to try and write some decimals on their sheets. Say some numbers such as 3.15, 14.32, etc.
    6) Break students into teams. Write numbers on the board and ask students to discuss with their teams first, then identify the decimals (think, pair, share).
    7) Next you can play a team game with the students, just to liven it up, write two decimals on the board. Give every team a chance to try and answer every question for a point. Give a total of ten questions asking which decimal is larger. Each team must write the answer on their sheets and the whole team must agree on the correct answer.
    a) 4.3 or 4.03
    b) 12.4 or 12.04
    c) 12.12 or 12.1
    d) 5.03 or 5.003
    e) 124.05 or 124.056
    f) 14.98 or 14.098
    g) 67.12 or 67.123
    h) 38.029 or 38.02
    i) 32.45 or 32.4
    j) 62.75 or 63.75
    8) Finally, have the students practice on their own using the classwork sheet that is attached.

    Follow-up Activities
    Students that are showing great mastery of decimals to the hundredths should move on to larger decimals and begin putting them in order from least to greatest.
    Cross-Curriculum Ideas
    Learning decimals can be connected to a weight lesson in science.
    Downloadable Worksheets
    Mac users: To download, ctrl-click on the worksheet and choose "save link to disk"
  • Class work made in Tool Factory Word Processor
  • PowerPoint demonstration - Overview of decimals