Adding and Subtracting Fractions with Like and Unlike Denominators

2/6 + 1/2 =

• 5/6

• 3/6

• 4/6

• 3/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

To add or subtract, two fractions must have...

• a monkey.

• unlike terms.

• common denominators.

• the same numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Jada ate 3/8 of a pizza and Isaiah ate 1/4 of the pizza. How much pizza did they eat in all?

• 1/2

• 5/8

• 3/4

• 7/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

5/6 - 1/3 =

• 1/2

• 1/3

• 1/6

• 1/12

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

Calvin and some friends baked different kinds of pizza and cut them into different number of slices. They ate 1/4 of one pizza, 1/4 of another, 3/12 of another, and 1/12 of another. How much pizza did they eat? Simplify your answer.

• 8/12 pizza

• 4/8 pizza

• 1 whole pizza

• 5/6 pizza

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

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.7.NS.A.1C

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

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2