Adding and Subtracting Fractions with Unlike Denominator Models

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30
• 11
• 6
• 5

What number could be a common denominator for these two fractions?
2/3   and   3/4

• 3
• 4
• 7
• 12

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30
• 11
• 6
• 5

What must you have to add and subtract fractions?

• Common numerators
• Different numerators
• Different denominators
• Common denominators

2/3 + 1/2 = 

• 6/7
• 2/6
• 3/5
• 7/6

What is the sum of 1/2 + 1/3 + 1/6?  
Simplify your answer.

• 1
• 3/24
• 5/6
• 3/12

Which of these numbers could NOT be a common denominator for these three fractions?
1/3   and 2/5   and   3/10

• 15
• 30
• 60
• 90

2/6 + 2/8 =

• 4/14
• 4/8
• 7/12
• 8/16

4/8 + 1/3 =

• 5/11
• 4/8
• 5/6
• 4/11