Adding and Subtracting Fractions with Unlike Denominators

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

• 3
• 4
• 7
• 12

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

2/3 + 1/2 = 

• 6/7
• 2/6
• 3/5
• 7/6

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

1/3 + 1/2=

• 5/6
• 4/6
• 2/3

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

4/8 + 1/3 =

• 5/11
• 4/8
• 13/24
• 4/11

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

1/2 + 1/4 = 

• 3/4
• 2/4
• 3/6

What is a good common denominator for this question?    3/4 - 3/12 = 

• 24
• 20
• 12

What is a good common denominator for this problem?    3/9 + 1/6 = 

• 18
• 9
• 24

What is a good common denominator for this problem?  5/8 + 3/6 = 

• 24
• 18
• 32