1. Do Now 1/14/10 Take out HW from night. Copy HW in your planner.
Text p. 228, #10-50 evens
Copy HW in your planner.
Text p. 234, #12-50 evens
Quiz sections Wednesday
In your notebook, rewrite the variable expressions with a common denominator.

2. Homework Textbook p 228, #10-50 evens
36) -9/d
38) 1 5/9
40) -1
42) -2 3/31
44) 2 ft, 8 1/2 in
46) 2/7
48) 1/6
50) 3/4
10) 1 2/5
12) -1 1/9
14) 1/3
16) -5/11
18) -1 1/2
20) 14 1/5
22) 5 3/11
24) -5 1/4
26) -1/7
28) 4 1/3 cups
30) t

3. Objective
SWBAT add and subtract unlike fractions.

4. Section 5.2 “Adding and Subtracting Like Fractions”
Adding Fractions with Common Denominators
To ADD fractions with common denominators, add their numerators together.
Add the numerators

5. Section 5.2 “Adding and Subtracting Like Fractions”
Subtracting Fractions with Common Denominators
To SUBTRACT fractions with common denominators, subtract their numerators.
Subtract the numerators

6. Fractions with Different Denominators
Section 5.3 “Adding and Subtracting Unlike Fractions”
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.
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

8. “Adding and Subtracting Mixed Numbers”
Mixed Numbers with Different Denominators
To ADD & SUBTRACT mixed numbers do the following:
1. Write the fractions as improper fractions
2. Write fractions using the LCD.
3. Add or subtract the numerators
4. Simplify if necessary

9. Try It Out
Improper fractions
Write fractions using LCD.
3. Simplify

10. Try It Out!!
Improper fractions
Write fractions using LCD.
3. Simplify

11. Rewrite the variable expressions with a common denominator.
Remember this?
Find the LCD for 5b and 4ab².
LCD = 20ab²
Rewrite equivalent fractions using the LCD.

12. Simplify the Expression.
Find the LCD for 2 and 6.
LCD = 6
Rewrite equivalent fractions using the LCD.

13. Simplify the Expression.
Find the LCD for 11 and 8.
LCD = 88
Rewrite equivalent fractions using the LCD.

14. Homework
Text p. 234, #12-50 evens

15. Homework Punchline worksheets #72 & #73
“Why Does the President Put
Vegetables in His Blender?”
HE IS HOPING FOR WHIRLED PEAS
“How Could Goldilocks and The Big
Bad Wolf Be in the Same House?”
IT WAS A TWO STORY HOUSE

16. Homework 2) 26 / 63 2) -4/5 2) -86 / 1 4) -17 / 36 4) 1 3/43
Practice worksheet
5.1 B evens
Practice worksheet
5.2 B evens
Practice worksheet
5.3 B evens
2) 26 / 63
4) -17 / 36
6) -1 23/60
8) 19 / 35
10) 1 2/15
12) -8/15
14) 1 19/45
16) 23/40
18) -2 31/50
20) -10/33
22) -5 41/48
24) 2 23/48
26) 43x / 24
28) -36x / 35
30) 11/35
2) -4/5
4) 1 3/43
6) 1/25
8) -21/40
10) -1 1/7
12) -11 5/9
14) 4 3/5
16) -5 5/8
18) 5x / 7
20) –x
22) 1 / 12x
24) 3 / x
2) -86 / 1
4) -109 / 12
6) -555 / 1
8) 67 / 14
10) -0.27
12) 8.15
14) -7.25
16)
18) 1.5
20)
22) 1/25
24) 14 1/200
26) 16/99
28) 3 23/30