2. Problem Solving: Adding and Subtracting with Fractions and Decimals Janie Baszile Cobb 6th Grade Campus GPISD

3. TEKS Objective use addition and subtraction to solve problems involving fractions and decimals

4. 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.

5. Review Let’s 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_deta il.aspx?id=73

6. 1. When adding fractions, use a common denominator. 2. Add the numerators and keep the denominators the same. Instructions 3.When subtracting fractions, use a common denominator. 4. Subtract the numerators and keep the denominators the same.

7. HOW TO ADD FRACTIONS Introducing: first addend second addend sum

8. o How to Add Fractions

9. HOW TO SUBTRACT FRACTIONS Introducing: minuend subtrahend difference

10. How to Subtract Fractions

11. Guided Practice 1/4+ 1/4+ 1/4= 3/4 ; Add the top Don’t add the bottom 9/10 – 2/10 = 7/10; Subtract the top Don’t subtract the bottom

12. 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 = ___

13. 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.

14. Fraction Mania! Hooray!