adding/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

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.5.NF.A.1

CCSS.5.NF.A.2

1/4 + 5/8

• 2/8
• 6/12
• 3/4
• 7/8

Tags

CCSS.4.NF.A.2

Add 2/3 + 5/12=?

• 7/12
• 1 1/12
• 11/12

Tags

CCSS.4.NF.A.2

Solve:
½ + ⅖

• 9/10
• 1/2
• 5/10
• 4/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

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.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

Which is NOT an equivalent fraction to one half?

• 2/4
• 2/3
• 4/8
• 3/6

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3B

CCSS.3.NF.A.3A

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30
• 11
• 6
• 5

Tags

CCSS.4.NF.A.2