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Focus on Fractions - Addition and Subtraction with Unlike - - PowerPoint PPT Presentation
Focus on Fractions - Addition and Subtraction with Unlike - - PowerPoint PPT Presentation
Focus on Fractions - Addition and Subtraction with Unlike Denominators with Lisa Riggs Welcome! Your host Lisa Riggs Regional Consultant Kentucky Center for Mathematics lriggs2@murraystate.edu KCM Website www.kentuckymathematics.org
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KCM Website
www.kentuckymathematics.org
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Today’s Agenda
- Research
- Standards
- Activities
- Resources
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Always, Sometimes, Never
To add or subtract fractions with unlike denominators you must first find a common denominator.
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Research
Link:
https://ies.ed.gov/ ncee/wwc/Docs/P racticeGuide/fracti
- ns_pg_093010.p
df
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IES Recommendations
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Quote from Greg Tang
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Standards
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What do you notice?
Teacher: see presenter notes
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What if . . .
Teacher: see presenter notes
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How many number sentences can you come up with?
Teacher: see presenter notes
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Let’s share!
Teacher: see presenter notes
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Picture Pie
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Picture Pie
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Picture Pie
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Fraction Track
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Fraction Track to 2
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Moving from materials to symbols
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Moving from materials to symbols
- Begin by using task where only 1
denominator has to be changed. ⅝ + ¾ The key question is - “How can we change this problem into one in which the parts are the same sized units?”
- Then continue to examples in which both
fractions need to be changed. ⅔ - ¼
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Fraction Progession - Addition of Fractions
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Resources
Investigation games Howard County Public School System Georgia Standards Framework
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Upcoming Sessions
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Follow Us!
www.kentuckymathematics.org
@KyMath @KyCenterforMath
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