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# How Addition And Subtraction Work

## on Nov 03, 2008

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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 WorkPresentation Transcript

• HOW ADDITION AND SUBTRACTION WORK Allison Staley ED 205-06
• How Subtraction Works
• Taking It Away (Subtraction)
• Video on Addition and Subtraction
• 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?
• SUBTRACTION:
• Look at this set:
• Count how many triangles are in this set.
• TAKING IT AWAY:
• Now take away two triangles:
• How many triangles are left?
• 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!