Adding Fractions with Unlike Denominators

• 18

• 9

• 24

• 12

Tags

CCSS.7.NS.A.1C

• 12

• 18

• 24

• 36

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

2/6 + 1/2 =

• 5/6
• 3/6
• 4/6
• 3/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the best common denominator for this problem?

• 6

• 8

• 24

• 48

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

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction
• Rewrite the fractions in the simplest form. 
• Find a common denominator. 
• Make each fraction into an improper faction. 

Tags

CCSS.7.NS.A.1C

3/8 + 2/4 =

• 5/12
• 5/8
• 7/8
• 6/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 1/2

• 5/8

• 3/4

• 2/8

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D