Adding and Subtracting Mixed Numbers and Fractions

What must you do first in order to add or subtract fractions with unlike denominators?

• add the numerators

• add the denominators

• find a common denominator

• find a common numerator

Tags

CCSS.7.NS.A.1C

2 1/4 + 3 2/12

• 5 3/4

• 5 5/12

• 5 3/12

• 5 2/4

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Solve this mixed number equation:
1⅔ + 1⅚

• 3 1/2

• 2 7/6

• 3 7/6

• 2 7/9

Tags

CCSS.7.NS.A.1C

• 5 1/2
• 1 1/6
• 5 5/14
• 4 19/24

Tags

CCSS.7.NS.A.1C

Tim has a board that is 5/6 feet long. He painted 2/18 feet of his board last night. How much more does Tim have left to paint?

• 13/18

• 7/24

• 7/18

• 3/7

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

The number on top of the fraction bar is called the _______. The number under the fraction bar is called the ______.

• denominator; numerator

• numerator; denominator

• mixed number; fraction

• fraction; mixed number

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

3 1/4 - 1 4/5

• 2 3/5

• 2 1/4

• 1 8/20

• 1 17/20

Tags

CCSS.7.NS.A.1C

Monique wants to bake a cake. She needs 2 1/8 cups of sugar, and 1 5/24 cups of flour. How many cups of ingredients will she use in all?

• 3 8/24 cups

• 3 3/32 cups

• 3 8/32 cups

• 3 3/24 cups

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

• 3

• 4

• 24

• 12