adding and subtracting fractions 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

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3

• 4

• 24

• 12

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

What is the the next step to finding this answer?

• Add the numerators (1+1=2)

• Multiply 12 X 1 for both fractions to find a new numerator

• Multiply to find each new numerator by the multiple used to get 12. (3 X1) (4 X 1)

• This is a mistake, you don't need to convert to twelfths

Solve this equation using the least common denominator. 
¼ + ½

• 3/4

• 2/8

• 6/4

• 6/8

Add 1/6 + 1/2=? Simplify your answer.

• 4/6

• 3/8

• 3/6

• 2/3

4/5 - 1/20 = 

• 0

• 20/15

• 3/15

• 15/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

8/9 - 1/3 = 

• 7/6

• 5/9

• 2/3

• 8/27

5/7 + 1/28 = 

• 6/35

• 12/196

• 21/28

• 1

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

3/5 + 1/4 = 

• 5/20

• 12/20

• 7/20

• 17/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2