adding and subtracting fractions with unlike denominators

Is this a correct answer?

• Yes, the student correctly added.
• No, you cannot add unlike denominators
• No, 5 + 7 is not 12
• No, 2 + 3 is not 5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Solve: 4/18 + 2/9

• 4/9

• 8/18

• 4/18

• 8/9

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 2/5
• 5/6
• 4/6
• 1/5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is 8/9 - 5/6?

• 1/18
• 3/4
• 6/7
• 10/12

Tags

CCSS.7.NS.A.1C

Simplify  9/18

• 1/2
• 3/6
• 9/18
• 5/10

Tags

CCSS.4.NF.A.1

CCSS.4.NF.A.2

Simplify  6/42

• 2/5
• 7
• 1/7
• 3/21

Tags

CCSS.5.NF.B.3

• 1
• 3/6
• 1/2
• 2

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

3/8 + 2/4 =

• 5/12

• 5/8

• 7/8

• 6/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

2/6 + 1/2 =

• 5/6
• 3/6
• 4/6
• 3/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

7/8 - 1/6 = 

• 17/24
• 15/18
• 12/24

Tags

CCSS.7.NS.A.1C