How Addition And Subtraction Work
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How Addition And Subtraction Work

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ED 205 Powerpoint Project for Lower Elem. on how addition and subtraction work.

ED 205 Powerpoint Project for Lower Elem. on how addition and subtraction work.

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How Addition And Subtraction Work How Addition And Subtraction Work Presentation Transcript

  • HOW ADDITION AND SUBTRACTION WORK Allison Staley ED 205-06
  • ADDITION AND SUBTRACTION
    • How Addition Works
    • Putting Sets Together (Addition)
    • How Subtraction Works
    • Taking It Away (Subtraction)
    • Video on Addition and Subtraction
    • About the Author
    • Resources
    • Concept Map
    Quit
  • ADDITION: First, look at the two sets: Set A Set B Count how many triangles are in each set. Click here to see the answers! Quit
  • PUTTING SETS TOGETHER:
    • Set A Set B
    • Adding the two sets together will give us how many triangles?
    Click here to see the answers! Quit
  • SUBTRACTION:
    • Look at this set:
    • Count how many triangles are in this set.
    Click here to see the answers! Quit
  • TAKING IT AWAY:
    • Now take away two triangles:
    • How many triangles are left?
    Click here to see the answers! Quit
  • ADDITION & SUBTRACTION Quit
  • ABOUT THE AUTHOR:
    • My name is Allison Staley.
    • I’m a student at Grand Valley State University.
    • I’m majoring in Mathematics with an Elementary Education Minor.
    • I am a huge fan of the Tigers and the Red Wings!
    Email me: [email_address] Quit
  • RESOURCES
    • United Streaming
    • http://player.discoveryeducation.com/index.cfm?guidAssetId=7EC1A971-834F-47C3-BB9F-740892BF1182&blnFromSearch=1&productcode=US
    • Cool Math 4 Kids
    • http://www.coolmath4kids.com
    Quit
  • CONCEPT MAP: Quit
  • Set A Set B There are 2 There are 3 Quit Return
  • It will give us 5. So 2 + 3 = 5 Quit Return
  • There are 5 triangles. Quit Return
  • There are 3 triangles left. So 5 – 2 = 3 Quit Return