Adding fractions with unlike denomoters

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

• 3
• 4
• 7
• 12

Tags

CCSS.5.NF.A.1

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.5.NF.A.1

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.5.NF.A.1

CCSS.5.NF.A.2

• 12/17
• 17/20
• 20/17
• 2  1/2

Tags

CCSS.7.NS.A.1C

• 1
• 3/6
• 1/2
• 2

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

• 2/5
• 5/6
• 4/6
• 1/5

Tags

CCSS.3.MD.A.1

• 13/15
• 1 7/12
• 1
• 9/15

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 2/5
• 5/6
• 4/6
• 1/5

• 14/16
• 7/8
• 8/7
• 4/10

2/8 + 1/ 6 =

• 3/ 14
• 2/ 8
• 3/8
• 5/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2