1. Adding & Subtracting Fractions

2. In your groups, solve the following addition problem2 5 1 5 + =

3. In your groups, solve the following addition problem2 5 1 5 3 5 + =

4. Try this one 4 7 2 7 + =

5. Try this one 4 7 2 7 6 7 + =

6. What’s the rule?
When the denominators are the same, add the numerators together and leave the denominators alone + = 3 6 2 6 5 6

7. Adding fractions with DIFFERENT denominators
need to find the lowest common multiple (LCM) between the denominators of 6 and 12
similar to comparing fractions
The LCM for the denominators is 12

8. Find the equivalent fractions5 6 = 10 12 1 12 5 6 +
Next, we add the fractions with the denominator of 12 1 12 + 10 = 11

9. Try These

10. Subtracting Fractions
Same steps as with addition
4 6 − 2 4
The LCM of 6 and 4 is 12

11. Equivalent fractions 4 6 __ 12 = __ 12 2 4 =
Subtract 8 12 6 12 = 2 12 -

12. Mixed Numbers to improper Fractions
1. Multiply the denominator by the whole number
2. Add the product to the numerator
Key focus: What happens to the denominator?

13. Try these

14. Now try answering the following questions by converting each mixed number into an improper fraction:+