Adding/Subtracting Fractions

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 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

Fill in the blank in order to create a true number sentence:
1/2 = __ /8

• 2
• 4
• 6
• 8

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Fill in the blank in order to create a true number sentence:
3/5 = __ /10

• 6
• 15
• 5
• 10

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

• 5/14
• 3/7
• 5/7
• 5/14

• 3/10
• 3/5
• 3/25
• 15/5

• 4/5
• 4/10
• 2/5
• 5

• 1
• 3/6
• 1/2
• 2

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

1/3 + 1/9

• 2/9
• 4/9
• 2/12
• 3/9

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D