Adding and Subtracting Unlike Denominators

• 14/16

• 7/8

• 8/7

• 4/10

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

• 13/15
• 1 7/12
• 1
• 9/15

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the sum of these fractions in lowest terms?

• 4/5

• 3/20

• 17/20

• 4/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

3/5 + 7/10

• 13/10

• 10/15

• 10/5

• 15/15

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

Add 2/3 + 5/12=?

• 7/12

• 1 1/12

• 11/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is 4/5 + 3/6?

• 7/9

• 7/11

• 1 3/10

• 1 7/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the sum of 3/4 and 2/6?

• 13/12

• 6/8

• 8/24

• 8/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Find the difference:

7/9 - 2/5

• 17/45

• 5/4

• 5/9

• 5/45

Tags

CCSS.7.NS.A.1C