Adding Fractions With Like And Unlike Denominators

Solve.
5/9 + 2/9 + 4/9

• 1  2/9

• 5   6/9

• 11/27

• 12/3

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

8/10 + 3/5

• 11/15

• 1 1/5

• 14/15

• 1 4/10

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

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 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

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

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

• 3/4

• 2/8

• 6/4

• 6/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator of 1/2 and 3/7?

• 2

• 14

• 7

• 28

3/9 + 4/9

• 7/18

• 7/9

• 12/9

• 12/81

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

50/100 + 25/100 =

• 100/75

• 100/100

• 75/100

• 52/100

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D