Problem Solving: Adding and Subtracting with Fractions and Decimals

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Problem Solving Adding and Subtracting with
Fractions and Decimals

• Janie Baszile
• Cobb 6th Grade Campus
• GPISD

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TEKS Objective

• use addition and subtraction to solve problems
  involving fractions and decimals

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Purpose

• The purpose is to improve problem-solving skills
  using addition and subtraction in fractions and
  decimals.
• Students will be able to use key concepts to add
  and subtract fractions.

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Review

• Lets review some common fractions by playing a
  game of concentration.
• Click on the sit below. Make sure you choose
  fractions when you get to the site.
• http//illuminations.nctm.org/tools/tool_detail.as
  px?id73

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Instructions
1. When adding fractions, use a common
denominator.
2. Add the numerators and keep the denominators
the same.
3.When subtracting fractions, use a common
denominator. 4. Subtract the numerators and keep
the denominators the same.
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HOW TO ADD FRACTIONS Introducing first addend
second addend sum
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How to Add Fractions
o
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HOW TO SUBTRACT FRACTIONS Introducing minuend
subtrahenddifference
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How to Subtract Fractions
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Guided Practice

• 1/4 1/4 1/4 3/4 Add the top
• Dont add the bottom
• 9/10 2/10 7/10 Subtract the top
• Dont subtract the bottom

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Independent Practice

• Add .. Numerators only.
• 1/5 1/5___ 1/10 2/10___ 1/6 4/6 ___
• 1/8 2/8___ 5/9 3/9 ___
• Subtract.. Numerators only.
• 9/10 8/10 ___ 4/7 2/7 ___
• 6/9 3/9 ___ 4/5 3/5__ 11/12 4/12 ___

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Summary

• This lesson will enable students to..
• ..gain an understanding of fractions in multiple
  operations.
• ..demonstrate the ability to add and subtracts
  independently with success.

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Fraction Mania! Hooray!