1. Do Now 12/1/11 Copy HW in your planner.
Text p. 120, #10-38 evens
In your journal, estimate what fraction of your day you spend on the following: school, eating, traveling (by car or bus), sleeping, extra-curricular activities. Then determine how much “spare time” you have each day.

2. Objective
SWBAT add and subtract fractions.

3. Section 3-5 “Adding and Subtracting Fractions”
Adding Fractions with Common Denominators
To ADD fractions with common denominators, add their numerators together. Simplify if necessary.
Add the numerators

4. Subtracting Fractions with Common Denominators
To SUBTRACT fractions with common denominators, subtract their numerators. Simplify if necessary.
Subtract the numerators

5. Try It Out!! Solve
“Opp-opp”
Put the negative sign with the numerator.

6. Fractions with Different Denominators
To ADD or SUBTRACT fractions with different denominators follow these steps:
1. Rewrite the fractions using a common denominator.
2. Add or subtract the numerators.
Equivalent
fractions
What is the common denominator?
5: 5, 10, 15, 20, 25, 30, 35, 40
7: 7, 14, 21, 28, 35, 42

7. Try It Out!! Solve Don’t forget your integer rules. “Opp-Opp”
-7 + (-3) = -10

8. Try It Out!! Solve Don’t forget your integer rules. “Opp-Opp”
-16 + (-2) = -18

9. Don’t forget your integer rules.
“Opp-Opp”
-16 + (-2) = -18

10. NJASK7 Prep
Homework
Text p. 228, #10-28 evens, evens