Adding & 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

Tags

CCSS.4.NF.A.2

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

• 30
• 11
• 6
• 5

Tags

CCSS.4.NF.A.2

What number could be a common denominator for these two fractions?
3/10   and   1/5

• 5
• 10
• 15
• These numbers do not have a common denominator

Tags

CCSS.4.NF.A.2

What number could be a common denominator for these three fractions?
1/2   and   1/3   and   1/4

• 9
• 8
• 12
• 6

Tags

CCSS.4.NF.A.2

3/4 + 2/8 = 

• 1
• 5/12
• 6/32
• 5/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the difference between 11/12 and 3/4? 
*Be sure to simplify your answer*

• 2/12
• 1/6
• 2/6
• 3/12

What is 3/4 - 2/5?

• -1
• 1/20
• 7/20
• 23/20

Tags

CCSS.7.NS.A.1C

What must you do first in order to add or subtract fractions with unlike denominators?

• add the numerators
• add the denominators
• find a common denominator
• find a common numerator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Which of the following is an improper fraction?

• 2/3
• 3/2
• 1  2/3
• 1/3

Tags

CCSS.3.NF.A.3C