1. Fractions Unite!
Cows uniting

2. Addition & Subtraction
Procedure:
No mixed numbers or whole numbers
Same denominator
If not
Find the LCM of the denominators
Compare and multiply up
Combine numerators
Reduce
Find the GCF of the numerator & denominator
Rejoice!

3. Examples a plenty 2/7 + 3/7 Ask yourself (quietly!!!!)
A. Mixed numbers? No
B. Same Denominators?
Yes
Then combine numerators
= (2+3) / 7 = 5/7
C. Can I Reduce?
Finished!

4. Then combine numerators = (19 + 7) / 8 = 26/8 C. Can I Reduce?
2 and 3/8 + 7/8
A. Mixed numbers?
Yes 2 & 3/8 = 19/8
B. Same Denominators?
Yes
Then combine numerators
= (19 + 7) / 8 = 26/8
C. Can I Reduce?
GCF of 26 & 8 = 2
Divide Each by 2
13/4
Finished!

5. Combine numerators & Reduce Ex4: 8/w – 2/w (8-2)/w 6/w
5/6 + 3/8
LCM of 6 & 8 24
5/6 = ?/24
3/8 = ?/24
Combine numerators & Reduce
Ex4:
8/w – 2/w
(8-2)/w
6/w

6. Don’t be negative
Got Minus signs and negative signs throwing you off? No problem, just move them to the top
-5/6 = -(5/6) = 5/(-6) = -5/6
Ex5: -(5/6) + 3/4
Ex6: 2/(-3) – 4/5

7. Now You 1. 3/5 + 2/3 + 5/6 2. What’s the sum of 16 and 8&5/9
3. -5/12 + 5/8 + (-1/6)
4. -5/6 – 7/9
5. 6 – 46/11
6. Is -1/4 a sol’n for 2/3 – v =11/12

8. 1. 21/10
2. 221/9
3. 1/24
4. -29/18
5. 20/9
6. Of Course

9. Homework
1 – 154 EOO
2, 12, 32, 58, 68, 70, 100, 118, 136, 138, 154, 155